The Diocese of Saint Asaph is a diocese of the Church in Wales in north-east Wales, named after Saint Asaph, its second bishop.

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The Anglican Diocese of St Asaph in the north-east corner of Wales stretches from the borders of Chester in the east, to the Conwy valley in the west, to Bala in the south-west, and Newtown in the south-east. The population is in excess of half a million people.

The more populous areas are to be found along the coast and in the large conurbation of Wrexham, the principal town. The industrial areas around Wrexham and Deeside have undergone great change in the past decade or so. Where once the coal, steel and textile industries provided most of the employment, the economy is now much more diversified and one of the fastest growing in the UK. A major employer is Airbus UK (currently part of BAE Systems), while Wrexham Industrial Estate is one of the largest in Europe. North-east Wales also acts as a dormitory area for Chester Business Park, which is dominated by MBNA. This economy is ministered to by an Industrial Chaplain, a post which alternates between a Church in Wales priest and a Presbyterian Church of Wales minister.

Most of the diocese is rural, interspersed with small market towns and village communities. The southern area of the diocese in north Powys is undergoing regional development, especially with the advent of a good number of small industries. Because of the beauty of the landscape, at holiday times there is a large influx of visitors from England and further afield. Tourism is now one of the growth industries of this area of Wales.

Traditionally, the Diocese of St Asaph extended across the border into England. However, following disestablishment on 31 March 1920, the Shropshire parishes of Criftins, Hengoed, Kinnerley, Knockin, Llanyblodwel, Llanymynech, Melverley, Morton, Oswestry, St Martins, Selattyn, Trefonen, Weston Rhyn and Whittington were transferred from the Diocese of St Asaph to the English Diocese of Lichfield.

This diocese was founded by St. Kentigern about the middle of the sixth century, when he was exiled from his see in Scotland. He founded a monastery called Llanelwy at the confluence of the rivers Clwyd and Elwy in north east Wales, where after his return to Scotland in 573 he was succeeded by Asaph or Asa, who was consecrated Bishop of Llanelwy.

The diocese originally coincided with the Welsh principality of Powys, but lost much territory first by the Mercian encroachment marked by Watt's dyke and again by the construction of Offa's dyke, soon after 798. Nothing is known of the history of the diocese during the disturbed period that followed. Domesday Book gives scanty particulars of a few churches but is silent as to the cathedral.

Early in the twelfth century, Norman influence asserted itself and in 1143 Theobald, Archbishop of Canterbury, consecrated one Gilbert as Bishop of St. Asaph, but the position of his successors was very difficult and one of them, Godfrey, was driven away by poverty and the hostility of the Welsh. A return made in the middle of the thirteenth century (British Library, Cotton MSS, Vitellius, c. x.) shows the existence of eight rural deaneries, seventy-nine churches, and nineteen chapels. By 1291 the deaneries had been doubled in number and there were Cistercian houses at Basingwerk, Aberconway, Strata Marcella and Valle Crucis, and a Cistercian nunnery, Llanllugan Abbey. The cathedral, which had been burnt in the wars, was rebuilt and completed in 1295. It was a plain massive structure of simple plan, and was again destroyed during the English succession Wars of the Roses. When it was restored by Bishop Redman the palace was not rebuilt and thus the bishops continued to be nonresident. At the end of the fifteenth century there was a great revival of church building, as is evidenced by the churches of that date still existing in the diocese.

The chief shrines in the diocese were St. Winefred's Well, St. Garmon in Yale (Welsh: Iâl), St. Dervel Gadarn in Edeirnion, St. Monacella at Pennant and the Holy Cross in Strata Marcella. All these were demolished at the Anglican Reformation. At that time the diocese contained one archdeaconry, sixteen deaneries and one hundred and twenty-one parishes. The bishop at this time had five episcopal residences, four of which were assumed by the Church of England bishop under Edward VI.

The Report of the Commissioners appointed by his Majesty to inquire into the Ecclesiastical Revenues of England and Wales (1835) found the see had an annual net income of £6,301. This made it the wealthiest diocese in Wales and the fourth richest in Britain after Canterbury, London and Winchester.

The archdeaconry was created from that of St Asaph on 6 February 1844.

The archdeaconry was created from those of St Asaph and of Montgomery on 25 March 1890.

Some archdeacons of Wrexham are recorded with the title Archdeacon of Wrexham and Ruthin.

• 1890–1897 (res.): David Howell
• 1897–1910 (res.): Llewelyn Wynne Jones
• 1910–1925 (res.): William Fletcher
• 1925–1930 (d.): Lewis Pryce
• 1930–1947 (ret.): James Williams
• 1948–1957 (res.): Richard Mackenzie Williams
• 1957-1969 (res): Benjamin Jones-Perrott
• 1969–1978 (ret.): John Davies
• 1978–1987 (d.): Raymond Foster
• 1987–2001 (ret.): Bryan Williams
• 2001–2010 (res.): Malcolm Squires
• 2010–2013 (ret.): Shirley Griffiths
• 2014–2018: Bob Griffiths
• 7 October 2018 – 2021: John Lomas (became Bishop of Swansea and Brecon)
• 5 March 2023 – present: Hayley Matthews

Hayley Deborah Yeshua Matthews (born 1968) was collated Archdeacon of Wrexham on 5 March 2023. She trained for the ministry at Ridley Hall, Cambridge before receiving ordination in the Church of England: she was made deacon at Petertide 2007 (1 July) — by Nicholas Reade, Bishop of Blackburn, at Blackburn Cathedral — and ordained priest the following Petertide (28 June 2008) — by Geoff Pearson, Bishop of Lancaster, at Lancaster Priory (i.e. Matthews' title church). During her time in Lancaster she was Chair of Churches Together Lancaster, Chaplain to the Dukes Theatre, and Honorary Padre to the Duke of Lancaster's Regimental Association. She served her title (curacy) at Lancaster Priory before moving to Manchester: first as Pioneer Chaplain to MediaCityUK and Honorary Chaplain to Salford University and the BBC where she was a regular contributor to BBC Radio Manchester, then as Rector of Holy Innocents Fallowfield with Birch, Honorary Chaplain to Manchester University at St Peter's House and Padre to 6MI Manchester. From 2012 - 2018 Matthews served as Trustee to the William Temple Foundation, latterly as acting Chair publishing the Temple Tract Grace and Power: sexuality and gender in the CHurch of England in 2015. Matthews was Director of Lay Training for Leeds diocese, Principal of Leeds School of Ministry, and an honorary canon of Ripon Cathedral prior to her archidiaconal appointment.

Diocese	Archdeaconry	Deanery	Churches	Population	People/church
Diocese of St Asaph	Archdeaconry of Montgomery	Deanery of Cedewain	9	17,716	1,968
		Deanery of Mathrafal	21	12,707	605
		Deanery of Penedeyrn	6	7,786	1,298
		Deanery of Pool	15	16,010	1,067
		Deanery of Valle Crucis	11	11,078	1,007
	Archdeaconry of St Asaph	Deanery of Denbigh	14	18,794	1,342
		Deanery of Dyffryn Clwyd	12	11,894	991
		Deanery of Holywell	14	35,404	2,529
		Deanery of Llanrwst and Rhos	26	74,181	2,853
		Deanery of St Asaph	16	69,730	4,358
	Archdeaconry of Wrexham	Deanery of Alyn	12	44,250	3,688
		Deanery of Dee Valley	18	38,741	2,152
		Deanery of Hawarden	19	80,416	4,232
		Deanery of Mold	11	24,178	2,198
		Deanery of Wrexham	8	48,615	6,077
Total/average			212	511,500	2,413

In addition to the clergy 'on the ground', the diocese is served by one Potential Cleric, two Hope Street Senior Leaders, one Bishop's Chaplain, one Anglican Chaplain and three Honorary Assistant Bishops.

APC = ancient parish church; MC = medieval chapelry.

This was formed by the union of the parishes of Garthbeibio, Llanerfyl, Llanfair Caereinion, Llangadfan, Llangynyw, Llanllugan, Manafon, Meifod, Pont Dolanog and Pont Robert. It is named after Llanfair Caereinion, the principal village. It has an estimated population of 4,857. As of September 2024 it was served by one Mission Area Leader (shared with Tanat-Vyrnwy), one Priest-in-Charge (shared with Tanat-Vyrnwy), one Pioneer Priest and one Assistant Curate.

Church	Founded (building)
St Tydecho, Garthbeibio	APC (1862)
St Erfyl, Llanerfyl	APC (1870)
St Mary, Llanfair Caereinion	APC (1868)
St Cadfan, Llangadfan	APC
St Cynyw, Llangynyw	APC
St Mary, Llanllugan	APC
St Michael & All Angels, Manafon	APC
SS Tysilio & Mary, Meifod	APC
St John the Evangelist, Dolanog	1853
St John the Evangelist, Pontrobert	1853
Former churches	Founded (build)	Closed

Original dedication to St Tysilio

This was formed by the union of the parishes of Aberhafesp, Betws Cedewain, Dolfor, Kerry, Llanllwchaiarn All Saints, Llanllwchaiarn St Llwchaiarn, Llanmerewig, Llanwyddelan, Mochdre and Tregynon. It is named after the medieval cantref of Cedewain. It has an estimated population of 16,433. As of September 2024 it was served by one Priest-in-Charge.

Church	Founded (building)
St Gwynog, Aberhafesp	APC
St Beuno, Bettws Cedewain	APC
St Michael & All Angels, Kerry	APC
All Saints, Newtown	1890
St Llwchaiarn, Llanllwchaiarn	APC (1816)
St Llwchaiarn, Llanmerewig	APC (1845)
St Gwyddelan, Llanwyddelan	APC (1865)
All Saints, Mochdre	APC (1867)
St Cynon, Tregynon	APC
Former churches	Founded (build)	Closed
St Paul, Dolfor	C19th	2020
St Mary, Newtown	APC	1856
St David, Newtown	1843	2006

This was formed by the union of the parishes of Berriew, Buttington, Castle Caereinion, Criggion, Forden, Fron, Guilsfield, Llandrinio, Llandysilio St Mary, Llandysilio St Tysilio, Llandyssil, Montgomery, Pantyffridd, Penrhos, Pool Quay and Welshpool. It is named after Welshpool, the principal town. It has an estimated population of 17,113. As of September 2024 it was served by one Mission Area Leader, two Priests in Charge and one Associate Priest.

Church	Founded (building)
St Beuno, Berriew	APC
All Saints, Buttington	APC
St Garmon, Castle Caereinion	APC (1865)
St Michael & All Angels, Criggion	MC (c. 1770)
St Michael & All Angels, Forden	APC (1867)
St Aelhaiarn, Guilsfield	APC
SS Trinio, Peter & Paul, Llandrinio	APC
St Tysilio, Llandysilio	APC (1867)
St Tysul, Llandyssil	APC (1866)
St Nicholas, Montgomery	APC
Pantyffridd Mission Church	1858
Holy Trinity, Penrhos	1625 (1845)
St John the Evangelist, Pool Quay	1862
St Mary, Welshpool	APC
St John's Mission Church, Garthmyl	C19th
Former churches	Founded (build)	Closed
Christ Church, Welshpool	1839	1998
Trewern Mission Church	C19th
Belan Mission Church	1840	2020

original dedication to St Trinio

This was formed by the union of the parishes of Brithdir, Bwlchycibau, Llanarmon Mynydd, Llanfechain, Llangadwaladr, Llangedwyn, Llangynog, Llanrhaeadr-Ym-Mochnant, Llansantffraid-Ym-Mechain, Llansilin, Llanwddyn, Llwydiarth, Pennant Melangell and Penybontfawr. It is named after the River Tanat and River Vyrnwy. It has an estimated population of 7,301. As of September 2024 it was served by one Mission Area Leader (shared with Caereinion), two Priests-in-Charge (one shared with Caereinion), and a House for Duty Priest.

Church	Founded (building)
St Cedwyn, Llangedwyn	MC
St Melangell, Pennant Melangell	APC
St Dogfan, Llanrhaeadr-ym-Mochnant	APC
St Silin, Llansilin	APC
St Thomas, Penybontfawr	1855
St Garmon, Llanfechain	APC
St Mary, Llwydiarth	1854
St Myllin, Llanfyllin	APC (1710)
St Bridget, Llansantffraid-ym-Mechan	APC
St Wyddyn, Llanwddyn	1887
Christ Church, Bwlchycibau	1864
Former churches	Founded (build)	Closed
St Cynog, Llangynog	APC (1792)	c. 2018
St Mary, Brithdir	1892	c. 2018
Rhiwlas Mission Church		c. 2018
St Garmon, Llanarmon Mynydd Mawr	MC
St Illog, Hirnant	APC (1886)
St John the Baptist, Llanwddyn	MC	1880s
St Cadwaladr, Llangadwaladr	MC	2020
St Michael, Llanfihangel-yng-Ngwynfa	APC (1864)	2020

This was formed in 2022 by the merger of the existing mission areas of Valle Crucis and Penedeyrn. The original Valle Crucis was formed in 2017 by the union of the parishes of Bryneglwys, Corwen St Ffraid, Corwen SS Mael & Sulien, Glyndyfrdwy, Gwyddelwern, Llanarmon Dyffryn Ceiriog, Llandegla, Llangollen St Collen, Llangollen St John, Llansantffraid Glyn Ceiriog, Llansantffraid Glyn Dyfrdwy, Llantysilio, Pontfadog and Trevor, and was named after Valle Crucis Abbey. Penedeyrn was formed by the union of the parishes of Bala, Cerrigydrudion, Dinmael, Frongoch, Llandderfel, Llandrillo, Llanfihangel Glyn Myfyr, Llangar, Llangwm, Llawrybetws and Ysbyty Ifan, and was named after part of the historical area of Edeirnion. The combined Mission Area has an estimated population of 19,695. As of September 2024 it was served by two Priests in Charge and a House for Duty Priest.

Church	Founded (building)
Christ Church, Bala	1811 (1857)
St Mary Magdalene, Cerrigydrudion	APC
St Trillo, Llandrillo-yn-Edeyrn	APC (1776)
St John the Evangelist, Cynwyd	1856
St Collen, Llangollen	APC
St Tysilio, Llantysilio	APC
Trevor Parish Church	1772
SS Mael & Sulien, Corwen	APC
St Bridget, Llansantffraid Glyn Dyfrdwy	APC (1611)
St Thomas, Glyndyfrdwy	1859
St Tysilio, Bryneglwys	APC
St Tecla, Llandegla	APC (1866)
St Garmon, Llanarmon Dyffryn Ceiriog	APC (1845)
St John the Baptist, Pontfadog	1847
Former churches	Founded (build)	Closed
St Mary, Betws Gwerful Goch	APC
St Mark, Frongoch	1858
St Michael, Llanfihangel Glen Myfyr	APC	2020
SS Mor & Deiniol, Llanfor	APC	1992
All Saints, Llangar	APC	1856
St Jerome, Llangwm	APC (1747)
St Cywair, Llangywer	APC (1871)	c. 2000
St Deiniol, Llanuwchllyn	APC	2004
St Beuno, Llanycil	APC	c. 2000
St James, Llawrybetws	1861
Pentrefoelas Parish Church	C18th (1859)
Holy Trinity, Rhosygwaliau	1880
St John the Baptist, Ysbyty Ifan	APC (1861)	2016
St Catherine, Maerdy	1878	c. 2022
St Derfel, Llandderfel	APC	c. 2023
St Mary, Eglwyseg	1870	1985
St James, Glan-yr-afon	1864
St Ffraid, Llansantffraid Glyn Ceiriog	MC (1790)
St Beuno, Gwyddelwern	APC
St Aelhaearn, Llanaelhaearn	APC	C17th
St John, Llangollen	1858	2020

occasional services still held original dedication to St Deiniol

This was formed by the union of the parishes of Bryn Pydew, Craigydon, Deganwy, Eglwysrhos, Llanddoget, Llandudno Junction, Llangystenin, Llanrwst, Llansantffraid Glan Conwy and Penrhyn Bay. It is named after the former district of Aberconwy. It has an estimated population of 33,954. As of September 2024 it was served by two Priests-in-Charge and an Associate Priest.

Church	Founded (building)
All Saints, Deganwy	1899
St Michael & All Angels, Llandudno Junction	1930
SS Eleri & Mary, Llanrhos	APC
St Martin, Eglwysbach	APC (1782)
St Paul, Craig-y-Don	1895
St Cystennin, Llangystennin	APC (1843)
St David, Penrhyn Bay	1963
St Grwst, Llanrwst	APC
St Bridget, Llansantffraid Glan Conwy	APC (1841)
Former churches	Founded (build)	Closed
St Garmon, Capel Garmon	MC	pre-2006
St Mary, Llanrwst	1841-1842	1980s
St Doged, Llandoged	APC	2020
St Catherine, Bryn Pydew	early C20th (1961)	2020

Occasional services still held 2original dedication to St Eleri

This was formed by the union of the parishes of Bodelwyddan, Rhuddlan, Rhyl Holy Trinity, Rhyl St Ann, Rhyl St Thomas and Towyn. It is named after ?. It has an estimated population of 41,017. As of September 2024 it was served by one Mission Area Leader, two Priests-in-Charge and one Transition Minister.

Church	Founded (building)
St Margaret, Bodelwyddan	1860
St Mary, Rhuddlan	APC
Holy Trinity, Rhyl	1835
St Thomas, Rhyl	1867
St Ann, Rhyl	1894
St Mary, Towyn	1873
Former churches	Founded (build)	Closed
St John, Rhyl	1885	1997

This was formed by the union of the parishes of Abergele, Betws-Yn-Rhos, Brynymaen, Colwyn, Colwyn Bay St David, Colwyn St Paul, Llanddulas, Llandrillo-Yn-Rhos St George, Llandrillo-Yn-Rhos St Trillo, Llanelian, Llanfair Talhaearn, Llangernyw, Llysfaen, Pensarn and St George. It is named after the River Aled. It has an estimated population of 47,402. As of September 2024 it was served by three Priests in Charge.

Church	Founded (building)
St Michael, Abergele	APC
St David, Pensarn	1880 (2011)
St George, St George	APC (1893)
St Michael, Betws yn Rhos	APC (1838)
St Elian, Llanelian	APC
St David, Colwyn Bay	1903
St Paul, Colwyn Bay	1872 (1888)
Christ Church, Bryn-y-Maen	1899
St Cynfryd, Llanddulas	APC (1869)
St Mary, Llanfair Talhaiarn	APC (C17th)
St Digain, Llangernyw	APC
St Sannan, Llansannan	APC
St Cynfran, Llysfaen	APC
SS Catherine & John the Baptist, Old Colwyn	1903
St George, Rhos-on-Sea	1913
St Trillo's Chapel, Rhos Trillo	MC
St Trillo, Llandrillo-yn-Rhos	APC
Former churches	Founded (build)	Closed
St John, Trofarth	1873	c. 2009
St Andrew, Colwyn Bay	1908	2013
St Winifred, Gwytherin	APC (1867)
St John the Baptist, Pontygwyddel	1882	1982
St Catherine, Old Colwyn	1837	2013
St David, Pandy Tudur	1866-1867

1original dedication to the Welsh saint Siôr 2original dedication to St John the Baptist

This was formed by the union of the parishes of Cwm, Dyserth St Bridget, Dyserth SS Mael & Sulien, Dyserth St Michael, Ffynnongroyw, Gronant, Gwaenysgor, Llanasa, Meliden St Mary Magdalene, Meliden St Melyd, Newmarket, Prestatyn Christ Church, Prestatyn Holy Spirit and Trelawnyd. It is named after the hills (bryn) and sea (mor) which dominate the landscape. It has an estimated population of 26,718. As of September 2024 it was served by one Mission Area Leader.

Church	Founded (building)
SS Bridget & Cwyfan, Dyserth	APC
St Michael & All Angels, Trelawnyd	APC (1724)
SS Asaph & Cyndeyrn, Llanasa	APC
All Saints, Ffynnongroew	1881
St Mary Magdalene, Gwaenysgor	APC
St Melyd, Meliden	APC
Christ Church, Prestatyn	1863
Holy Spirit, Prestatyn	1968
Former churches	Founded (build)	Closed
SS Mael & Sulien, Cwm	APC (c. 1500)
St Winifred, Gronant		C21st

original dedication to St Cwyfan original dedication to St Asaph

This was formed in 2018 by the union of the parishes of Bodfari, Bylchau, Caerwys, Cefn, Denbigh St Marcella, Denbigh St Mary, Henllan, Llandyrnog St Cwyfan, Llandyrnog St Tyrnog, Llangwyfan, Llannefydd, Llanrhaeadr-Yng-Nghinmeirch, Nantglyn, Sinan, Trefnant and Tremeirchion. It is named after Denbigh, the principal town. It has an estimated population of 18,223. As of September 2024 it was served by one Mission Area Leader and one Associate Priest.

Church	Founded (building)
St Stephen, Bodfari	APC (1865)
St Mary the Virgin, Denbigh	1875
St Marchell, Llanfarchell	APC
St Sadwrn, Henllan	APC (1806)
St Tyrnog, Llandyrnog	APC
St Cwyfan, Llangwyfan	APC
St Dyfnog, Llanrhaeadr-yng-Nghinmeirch	APC
St James, Nantglyn	APC (1862)
Holy Trinity, Trefnant	1855
Corpus Christi, Tremeirchion	APC
St Michael, Caerwys	APC
SS Nefydd & Mary, Llannefydd	APC
Former churches	Founded (build)	Closed
St Thomas, Bylchau	1857	c. 2019
St David (Leicester's Church), Denbigh	1578-1584	Never completed
St Hilary, Denbigh	MC	1874
St David, Denbigh	1838 (1895)	C20th
St James, Prion	1859	2008
St Mary, Cefn Meiriadog	1864	2023
All Saints, Sinan	1873	2023

original dedication to St Nefydd

This was formed by the union of the parishes of Clocaenog, Efenechtyd, Gyffylliog, Llanarmon Yn Ial, Llanbedr Dyffryn Clwyd, Llanelidan, Llanfair Dyffryn Clwyd, Llanfwrog, Llangynhafal, Llanrhydd, Llanychan, Llanynys, Rhewl and Ruthin. It is named after the Vale of Clwyd. It has an estimated population of 12,291. As of September 2024 it was served by one Mission Area Leader, two Priests in Charge and one Associate Priest.

Church	Founded (building)
St Foddhyd, Clocaenog	APC
St Mary, Cyffylliog	MC
St Michael, Efenechtyd	APC
St Garmon, Llanarmon-yn-Iâl	APC (1736)
(New) St Peter, Llanbedr Dyffryn Clwyd	1863
St Meugan, Llanrhydd	APC
SS Cynfarch & Mary, Llanfair Dyffryn Clwyd	APC
St Cynhafal, Llangynhafal	APC
St Hychan, Llanychan	APC
St Saeran, Llanynys	APC
Minster of St Peter, Ruthin	APC (C17th)
SS Mwrog & Mary, Llanfwrog	APC
Former churches	Founded (build)	Closed
St Mary, Derwen	APC	1999
St David, Eryrys	1862	1980s
St Elidan, Llanelidan	APC	2020
Rhewl Church
(Old) St Peter, Llanbedr Dyffryn Clwyd	APC	1864

additional dedication to St Mary added later

This was formed from the parish of St Asaph. It is named after the River Elwy. It has an estimated population of 3,730. As of September 2024 it was served by one Dean and one Canon Precentor.

Church	Founded (building)
Cathedral of SS Asaph & Cyndeyrn, St Asaph	APC
SS Asaph & Cyndeyrn, St Asaph (?)	MC (1872)

This was formed by the union of the parishes of Bagillt, Brynford, Caerfallwch, Flint SS Mary & David, Flint St Thomas, Gorsedd, Halkyn, Holywell Holy Trinity, Holywell St James, Holywell St Peter, Mostyn, Rhesycae, Rhosesmor, Whitford and Ysgeifiog. It is named after the natural features in the area. It has an estimated population of 35,943. As of September 2024 it was served by one Mission Area Leader, four Priests in Charge and one Assistant Curate.

Church	Founded (building)
St Peter, Holywell	1849 (2008)
Holy Trinity, Greenfield	1871
SS Mary & Peter, Bagillt	1839
St Michael, Brynford	1853
SS Mary & David, Flint	MC (1848)
St Thomas, Flint Mountain	1875
St Mary the Virgin, Halkyn	APC (1878)
Christ Church, Rhes-y-cae	1847
St Paul, Rhosesmor	1876
St James the Apostle, Holywell	APC (1769)
Christ Church, Mostyn	1845
SS Mary & Beuno, Whitford	APC
St Paul, Gorsedd	1853
St Mary, Ysceifiog	APC (1839)
Former churches	Founded (build)	Closed
St David, Flint	1872	2011
St Peter, Bagillt	c. 1890	2012

originally dedicated to St Mary alone original dedication to St Beuno original dedication to St Winefride

This was formed by the union of the parishes of Broughton, Brymbo, Bwlchgwyn, Gresford, Gwersyllt, Holt, Isycoed, Llay, Minera St Mary, Minera St Tydfil, Pentre Broughton, Rossett and Southsea. It is named after the River Alyn. It has an estimated population of 45,673. As of September 2024 it was served by one Mission Area Leader and two Curates.

Church	Founded (building)
All Saints, Gresford	APC
St Paul, Pentre Broughton	1889
All Saints, Southsea	1884 (1984)
Christ Church, Bwlchgwyn	1867
St Tydfil, Coedpoeth	1875 (1895)
Holy Trinity, Gwersyllt	1851
St Chad, Holt	MC
St Paul, Isycoed	1718 (1829)
St Martin of Tours, Llay	1925
St Mary, Minera	C17th (1866)
Christ Church, Rossett	1841 (1892)
Former churches	Founded (build)	Closed
St Peter, Brynteg	1894	2006
St Paul, Berse Drelincourt	1742	pre-2010
St John, Brymbo	1837 (1891)	1974
St Alban, Tanyfron	1896	2010
St Peter, Rhosrobin	1881 (1898)
St Mary, Brymbo	1838 (1871)	2023

This covers the former parishes of Broughton, Connah's Quay St David, Connah's Quay St Mark, Hawarden, Queensferry, Sandycroft, Sealand and Shotton. It is named after the Welsh-English border. It and Rhos a Mynydd have an estimated population of 81,940 and, as of September 2024, were served by one Mission Area Leader, two Priests in Charge and one Associate Priest.

Church	Founded (building)
St Mary, Broughton	1824
St Mark, Connah's Quay	1837
St David, Connah's Quay	1915
St Deiniol, Hawarden	APC (1859)
St Bartholomew, Sealand	1867
St Andrew, Garden City, Queensferry	pre-1900
St Ethelwold, Shotton	1875 (1902)
Former churches	Founded (build)	Closed
St Michael & All Angels, Mancot Royal
Holy Innocents, Queensferry	1887 (1889)	1960
St Francis, Sandycroft	1875 (1913)	c. 2022

original dedication to St Ambrose

This was formed by the union of the parishes of Bangor Monachorum, Bettisfield, Bronington, Erbistock, Eyton, Hanmer, Marchwiel, Overton, Penley and Worthenbury. It is named after the historical area of the Maelor. It has an estimated population of 8,672. As of September 2024 it was served by one Mission Area Leader and one Assistant Curate.

Church	Founded (building)
St Dunawd, Bangor-on-Dee	APC
Holy Trinity, Bronington	1836
St Hilary, Erbistock	APC (1861)
St Chad, Hanmer	APC (1892)
St Mary Magdalene, Penley	MC (1901)
SS Deiniol & Marcella, Marchwiel	APC (1778)
St Mary the Virgin, Overton-on-Dee	APC
Former churches	Founded (build)	Closed
St Mary Magdalene, Tallarn Green	1851 (1873)	2007
St Deiniol, Eyton	1939	2022
St John the Baptist, Bettisfield	1851 (1874)	2023
St Deiniol, Worthenbury	MC (1739)	2022

original dedication to St Deiniol occasional services still held (Pilgrim Church status) original dedication to St Erbin

This was formed by the union of the parishes of New Brighton, Cilcain, Gwernaffield, Llanferres, Mold, Nannerch, Nercwys, Northop SS Eurgain & Peter, Northop St Mary, Pontblyddyn, Rhyd-Y-Mwyn and Treuddyn. It is named after Mold, the principal town. It has an estimated population of 26,115. As of September 2024 it was served by three Priests-in-Charge, one Mission Area Priest and one Assistant Curate.

Church	Founded (building)
St James, New Brighton	1893
St Mary, Cilcain	APC
St John the Evangelist, Rhydymwyn	1864
Holy Trinity, Gwernaffield	1838 (1872)
Christ Church, Pontblyddyn	1836
St Mary, Mold	APC (c. 1500)
St Michael & All Angels, Nannerch	APC (1853)
St Mary, Nercwys	MC
SS Eurgain & Peter, Northop	APC
St Mary, Treuddyn	MC (1875)
St Berres, Llanferres	APC
Former churches	Founded (build)	Closed
St John the Evangelist, Mold	1879
St Mary, Northop Hall	c. 1890 (1912)	2020

original dedication to St Eurgain

This was formed by the union of the parishes of Chirk, Froncysyllte, Penycae, Rhosllanerchrugog St David, Rhosllanerchrugog St Mary, Rhosymedre, Ruabon All Saints and Ruabon St Mary. It is named after Offa's Dyke. It has an estimated population of 29,407. As of September 2024 it was served by one Mission Area Leader, one Priest in Charge, one Associate Priest and three Assistant Curates.

Church	Founded (building)
St John the Evangelist, Rhosymedre	1837
St Mary, Chirk	APC
St David, Froncysyllte	1871
St Thomas, Penycae	1878
St Mary, Johnstown	1929
St Mary, Ruabon	APC
All Saints, Pen-y-lan	1889
Former churches	Founded (build)	Closed
Halton Mission Church	1878	pre-1998
St David, Rhosllanerchrugog	1893	c. 2020
St John the Evangelist, Rhosllanerchrugog	1853	2005

original dedication to St Tysilio

This covers the former parishes of Bistre All Saints, Bistre Emmanuel, Bistre St Cecilia, Buckley Good Shepherd, Buckley St Matthew, Cymau, Ewloe, Hope, Llanfynydd, Mynydd Isa, Pentrobin and Penyffordd. The churches in this area were originally part of the Borderlands Mission Area, but this was deemed unworkably large and these churches split off to form the new Mission Area in 2024. For population and clergy numbers see Borderlands.

Church	Founded (building)
St Cecilia, Mynydd Isa	1892
Holy Spirit, Ewloe	1938
The Good Shepherd, Drury	late C19th
St Matthew, Buckley	1822 (1905)
St Cynfarch, Hope	APC
St Michael & All Angels, Llanfynydd	1843
Emmanuel, Penyffordd	1881 (1959)
Emmanuel, Bistre, Buckley	1842
All Saints, Buckley	pre-1892 (1892)
St John the Baptist, Penmynydd, Pentrobin	1843
Former churches	Founded (build)	Closed
All Saints, Cymau	1870	2023

This was formed by the union of the parishes of Bersham, Esclusham, Rhosddu, Wrexham All Saints, Wrexham St Giles, Wrexham St James, Wrexham St John, Wrexham St Margaret and Wrexham St Mark. It is named after Wrexham. It has an estimated population of 48,457. As of September 2024 it was served by one Mission Area Leader, one Priest in Charge and one Assistant Curate.

Church	Founded (building)
St Mary, Bersham	1873
Holy Trinity, Esclusham	1877
St John, Rhosnesni	1894 (1974)
St Mark, Caia Park	1961
St Giles, Wrexham	APC
All Saints, Wrexham	1912
St Margaret, Garden Village	1928
Hope Street Church, Wrexham	2021
Former churches	Founded (build)	Closed
St Peter, Wrexham	1910	C20th
St Mark, Wrexham	1858	1956
St John the Baptist, Wrexham	1909	1998
St David, Wrexham	1890
St James, Rhosddu	1875	2024

• All Saints: Buttington, Gresford, Llangar, Mochdre
• Corpus Christi: Tremeirchion
• St Aelhaiarn: Guilsfield, Llanaelhaearn
• St Asaph: Llanasa
• SS Asaph & Kentigern: St Asaph Cathedral, St Asaph
• St Berres: Llanferres
• St Beuno: Berriew, Bettwscedewain, Gwyddelwern, Llanycil, Whitford
• St Bridget: Llansantffraidglanconwy, Llansantffraidglynceiriog, Llansantffraidglyndyfrdwy, Llansantffraidymmechan
• St Cadfan: Llangadfan
• St Cadwaladr: Llangadwaladr
• St Cedwyn: Llangedwyn
• St Chad: Hanmer, Holt
• St Collen: Llangollen
• St Constantine: Llangystennin
• St Cwyfan: Dyserth, Llangwyfan
• St Cynfarch: Hope, Llanfairdyffrynclwyd
• St Cynfran: Llysfaen
• St Cynfryd: Llanddulas
• St Cynhafal: Llangynhafal
• St Cynog: Llangynog
• St Cynon: Tregynon
• St Cynyw: Llangynyw
• St Cywair: Llangywer
• St Deiniol: Hawarden, Llanfor, Llanuwchllyn, Marchwiel, Worthenbury
• St Derfel: Llandderfel
• St Digain: Llangernyw
• St Doged: Llandoged
• St Dogfan: Llanrhaeadrymmochnant
• St Dunawd: Bangor-on-Dee
• St Dyfnog: Llanrhaeadryngnghinmeirch
• St Eigen: Northop
• St Elian: Llanelian
• St Elidan: Llanelidan
• St Erbin: Erbistock
• St Erfyl: Llanerfyl
• St Foddhyd: Clocaenog
• St Germanus: Capelgarmon, Castlecaereinion, Llanarmondyffrynceiriog, Llanarmonmynyddmawr, Llanarmonynial, Llanfechain
• St Giles: Wrexham
• St Grwst: Llanrwst
• St Gwyddelan: Llanwyddelan
• St Gwynog: Aberhafesp
• St Hilary: Denbigh, Erbistock, Llanrhos
• St Hychan: Llanychan
• St Illog: Hirnant
• St James: Nantglyn
• St Jerome: Llangwm
• St John the Baptist: Llanwddyn, Ysbytyifan
• St Llwchaiarn: Llanllwchaiarn, Llanmerewig
• SS Maël & Sulien: Corwen, Cwm
• St Marchell: Llanfarchell
• St Martin: Eglwysbach
• St Mary: Betwsgwerfulgoch, Cilcain, Cyffylliog, Derwen, Flint, Halkyn, Llanfaircaereinion, Llanfairdyffrynclwyd, Llanfairtalhaiarn, Llanllugan, Mold, Nercwys, Newtown, Overton, Rhuddlan, Ruabon, Treuddyn, Welshpool, Ysceifiog
• St Mary Magdalene: Cerrigydrudion, Gwaenysgor, Penley
• St Mawgan: Llanrhydd
• St Melangell: Pennantmelangell
• St Melyd: Meliden
• St Michael: Abergele, Betwsynrhos, Caerwys, Criggion, Efenechtyd, Forden, Kerry, Llanfihangelglynmyfyr, Llanfihangelyngngwynfa, Manafon, Nannerch, Trelawnyd
• St Mwrog: Llanfwrog
• St Myllin: Llanfyllin
• St Nefydd: Llannefydd
• St Nicholas: Montgomery
• St Peter: Llanbedrdyffrynclwyd, Ruthin
• St Sadwrn: Henllan
• St Saeran: Llanynys
• St Sannan: Llansannan
• St Sior: St George
• St Stephen: Bodfari
• St Sulien: Llansilin
• St Tegla: Llandegla
• St Trillo: Llandrilloynedeirnion, Llandrilloynrhos, Rhostrillo
• St Trinio: Llandrinio
• St Tydecho: Garthbeibio
• St Tyrnog: Llandyrnog
• St Tysilio: Bryneglwys, Chirk, Llandysilio (Montgomeryshire), Llantysilio (Denbighshire), Meifod
• St Tysul: Llandyssil
• St Winifred: Gwytherin, Holywell

• All Saints: Buckley (C19th), Cymau (1870), Deganwy (1899), Ffynnongroew (1881), Newtown (1890), Penylan (1889), Sinan (1873), Southsea (1884), Wrexham (1912)
• Christ Church: Bala (1811), Brynymaen (1899), Bwlchgwyn (1867), Bwlchycibau (1864), Mostyn (1845), Pontblyddyn (1836), Prestatyn (1863), Rhesycae (1847), Rossett (1841), Welshpool (1839)
• Emmanuel: Buckley (1842), Penyffordd (1881)
• Good Shepherd: Drury (C19th)
• Holy Innocents: Queensferry (1887)
• Holy Spirit: Ewloe (1938), Prestatyn (1968)
• Holy Trinity: Bronington (1836), Esclusham (1877), Greenfield (1871), Gwernaffield (1838), Gwersyllt (1851), Penrhos (1625), Rhosygwaliau (1880), Rhyl (1835), Trefnant (1855)
• St Alban: Tanyfron (1896)
• St Ambrose: Sandycroft (1875)
• St Andrew: Colwyn Bay (1908), Garden City (C19th)
• St Anne: Rhyl (1894)
• St Bartholomew: Sealand (1867)
• St Catherine: Brynpydew (C20th), Maerdy (1878), Old Colwyn (1837)
• St Cecilia: Mynyddisa (1892)
• St David: Colwyn Bay (1903), Connah's Quay (1915), Denbigh (1838), Eryrys (1862), Flint (1872), Froncysyllte (1871), Newtown (1843), Pandytudur (1867), Penrhyn Bay (1963), Pensarn (1880), Rhosllanerchrugog (1893), Wrexham (1890)
• St Deiniol: Eyton (1939)
• St Ethelwold: Shotton (1875)
• St Francis: Sandycroft (1913)
• St George: Rhos-on-Sea (1913)
• St James: Glanyrafon (1864), Llawrybetws (1861), New Brighton (1893), Prion (1859), Rhosddu (1875)
• St John the Baptist: Bettisfield (1851), Old Colwyn (1903), Penmynydd (1843), Pontfadog (1847), Pontygwyddel (1882), Wrexham (1909)
• St John the Evangelist: Brymbo (1837), Cynwyd (1856), Dolanog (1853), Garthmyl (C19th), Llangollen (1858), Mold (1879), Pontrobert (1853), Pool Quay (1862), Rhosllanerchrugog (1853), Rhosnesni (1894), Rhosymedre (1837), Rhydymwyn (1864), Rhyl (1885), Trofarth (1873)
• St Margaret: Bodelwyddan (1860), Garden Village (1928)
• St Mark: Caia Park (1961), Connah's Quay (1837), Frongoch (1858), Wrexham (1858)
• St Martin: Llay (1925)
• St Mary: Bagillt (1839), Bersham (1873), Brithdir (1892), Broughton (1824), Brymbo (1838), Cefnmeiriadog (1864), Denbigh (1875), Eglwyseg (1870), Johnstown (1929), Llanrwst (1842), Llwydiarth (1854), Minera (C17th), Northop Hall (1890), Towyn (1873)
• St Mary Magdalene: Tallarn Green (1851)
• St Matthew: Buckley (1822)
• St Michael: Brynford (1853), Llandudno Junction (1930), Llanfynydd (1843), Mancot Royal (?)
• St Paul: Berse (1742), Colwyn Bay (1872), Craigydon (1895), Dolfor (C19th), Gorsedd (1853), Isycoed (1718), Pentre Broughton (1889), Rhosesmor (1876)
• St Peter: Bagillt (1890), Brynteg (1894), Holywell (1849), Llanbedrdyffrynclwyd (1863), Rhosrobin (1881), Wrexham (1910)
• St Thomas: Bylchau (1857), Flint Mountain (1875), Glyndyfrdwy (1859), Penybontfawr (1855), Penycae (1878), Rhyl (1867)
• St Tydfil: Coedpoeth (1875)
• St Winifred: Gronant (C20th)
• St Wyddyn: Llanwddyn (1887)
• No dedication/dedication unknown: Belan (1840), Halton (1878), Pantyffridd (1858), Pentrefoelas (C18th), Rhewl (?), Rhiwlas (?), Trevor (1772), Trewern (C19th), Wrexham (2021)

• Bishop of Saint Asaph
• Archdeacon of St Asaph

•  This article incorporates text from a publication now in the public domain: Herbermann, Charles, ed. (1913). "Ancient Diocese of Saint Asaph". Catholic Encyclopedia. New York: Robert Appleton Company.
• CATHOLIC ENCYCLOPEDIA: Ancient Diocese of Saint Asaph

53°15′26″N 3°26′31″W / 53.2572°N 3.4419°W / 53.2572; -3.4419