The Roman Catholic Diocese of Cochin (Latin: Dioecesis Coccinensis) is a Roman Catholic Diocese in Cochin, Kerala, India. A constituent of the sui iuris Latin Church, the diocese was established in 1557 after the domination of the Portuguese-speaking missionaries. The diocese is a suffragan church to the ecclesiastical province of the Metropolitan Latin Catholic Archdiocese of Verapoly, and serves the Latin Catholics of Malabar.

The diocese is situated with the Arabian Sea in the west, the Archdiocese of Verapoly in both north and east, and the Diocese of Alleppey in the south. The Santa Cruz Cathedral Basilica in Fort Cochin is the diocese's cathedral where the Diocesan Administrator resides. The current administrator is Msgr. Shaiju Pariyathusherry after the retirement of Joseph Kariyil, the Bishop emeritus in 2024.

The early Christian missionaries arrived in India from Portugal in 1550, pioneering the Portuguese mission in the country. Subsequently, the Christians of Cochin began practicing the Latin liturgical rite. St. Francis Xavier often visited the land of Cochin, where he offered holy mass at the St. Francis Church, in which lies the body of Vasco da Gama buried in 1524. The Order of the Franciscans built a monastery in 1518 and two more, of the Jesuit Order, in 1550 and 1561. In 1553 the Dominicans sisters started a College and Monastery in Cochin, and before 1557, publication began and book printing began in Cochin. The Society of Jesus was then founded by Father Balthazar Gago, S.J. in 1550 and in 1560, the King of Portugal built for the Society of Jesus, the college of Cochin, and in 1562, a novitiate of the Society was established there. Following the rising of the land, Pope Leo X, in 1514 erected the Diocese of Funchal, and in 1534, the Diocese of Goa which was joined by the people in Cochin. The diocese of Cochin was elected by Pope Paul IV on 4 February 1557, in his decree "Pro Excellenti Praeeminentia" for the two new suffragan dioceses (the other being Diocese of Malacca). After its erection as a diocese, it was the second and preceded southern and eastern India, Burma, and Ceylon (now Sri Lanka). It was later reorganized following the Concordat of 23 June 1886, between Leo XIII and King Luiz of Portugal.

Before the missionaries, people of Malabar practiced Hinduism, Christianity, Islam, and Judaism. Three out of the eight Franciscan friars, who sailed from Lisbon to India died in the 1500 masacre in Calicut. The survivors then settled at Cochin and from there began the foundation of the Diocese of Cochin. They also received support from other missionaries working from the city which was a centre. Vasco da Gama, a messenger from Portugal who had arrived at Cochin accepted the writings of the early converted Christians for the King of Portugal. The Syrian Bishop of those Christians promised obedience to the pope through the Franciscan missionaries and two Nestorian priests, who later accompanied Gama to Lisbon en route for Rome. The pioneer priests of the diocese, Franciscans João d'Elvas and Pedro d'Amarante until 1507, preached the Gospel at Vypeen, Palliport, and Cranganore. Father Vincent de Lagos established the College of Cranganore in 1540 to train the Nestorian Christians.

The Papal Bull of Pope Paul IV, which was used earlier in erecting the diocese was also utilised in raising the collegiate church of the Holy Cross, and the parish church of Cochin to a cathedral of the diocese with the first Bishop of Cochin, a Dominican Father Jorge Tremudo. In 1577, Brother João Gonsalves, S.J. was engraved at Cochin for the first time, thus, outlined the first Malealam book Outlines of Christian Doctrine, which was written in Portuguese by St. Francis Xavier to aid children. Cochin was taken on 6 January 1663, by the Dutch after a siege of six months. The city was reduced in size; the clergy were expelled; the monasteries and colleges, bishop's palace, etc, were razed to the ground. The church of St. Francis of Assisi, belonging to the Franciscan monastery was spared by the conquerors and converted for their religious use. After the English overthrew the Dutch, they kept the church which was turned into a merchandise to serve as a witness to the past four centuries, as well as an existing oldest church in India.

• 
  Santa Cruz Cathedral Basilica Fortcochin - Estd 1505
• 
  Our Lady Of Life Church Mattancherry Estd - (9th Century)
• 
  Our Lady Of Hope Church Vypeen Estd - 1605
• 
  St Augustine's Church Aroor - Estd 1901
• 
  St Lawrence Church Edacochin - Estd 9th Centuary
• 
  St Sebastian's Church Thoppumpady - Estd 1832
• 
  St Peter's Church Kumbalanghi
• 
  St George Church Pazhangad, Kumbalanghi

• Pope: Francis
• Bishop: sede vacante
• Diocesan Administrator: Very Rev Msgr Shaiju Pariathussery
• Episcopal Vicar For Religious & Judicial Vicar: Very Rev Fr Antony Kattiparambil
• Chancellor: Very Rev Dr Johney Xavier Puthukkattu
• Procurator: Very Rev Fr Maxon Kuttikattu
• Minor Seminary Rector: Very Rev Dr Antony Santhosh Veluthedath

Ordinaries of the diocese of Cochin

	Name	Period	Notes
	Jorge Temudo, O.P.	1557‍–‍1567	Appointed Archbishop of Goa
	Henrique de Távora e Brito [pt], O.P	1567‍–‍1578	Appointed Archbishop of Goa
	Antonio de Baja	1578
	Mateus de Medina [pt], O.S.A	1579‍–‍1588	Appointed Archbishop of Goa
	André de Santa Maria [pt], O.F.Μ.	1588‍–‍1610	Resigned
	Sebastião de São Pedro [pt], O.S.A.	1615‍–‍1624	Appointed Archbishop of Goa
	Luis de Brito de Menezes [pt]	1627‍–‍1629	Died in office
	Miguel da Cruz Rangel [pt], O.P.	1631‍–‍1646	Died in office
	Antonio da Serpa	1647
	João Coelho	1650‍–‍1650
	Francesco Baretto, S.J.	year uncertain‍–‍1663	Died in office
	Fábio dos Reis Fernandes [pt]	1672–1672	Appointed Bishop of Santiago de Cabo Verde
	Fernando da Santa Maria	1672
	Antonio da Santo Dionysio [pt], O.S.A.	1676‍–‍1685
	Pedro da Silva (bishop) [pt], O.S.A.	1688‍–‍1691	Died in office
	Antonio da Santa Teresa	1692
	Pedro Pachecco, O.P.	1694‍–‍1714	Died in office
	Francesco Pedro Dos Martyres	????‍–‍1715	Died; not possessed
	Francisco de Vasconcellos [pt], S.J.	1721‍–‍1743	Died in office
	Antonio de Conceisao	1745
	Clemente José Colaço Leitão [de], S.J.	1745‍–‍1771	Died
	Sebastiao da Costa	1777
	Emmanuel Felix Soares (de Santa Catarina) [pt], O.C.D.	1778‍–‍1783	Appointed Archbishop of Goa
	José Marques da Silva, O.C.D.	1783‍–‍year uncertain
	Tomás Manuel de Noronha e Brito [pt], O.P.	1819‍–‍1828	Confirmed, Bishop of Olinda
	Joakim de Santa Rita Boethello	1832
	João Gomes Ferreira [pt]	1887‍–‍1897	Died in office
	Mateus de Oliveira Xavier	1897‍–‍1909	Appointed Archbishop of Goa later Patriarch of the East Indies
	José Bento Martins Ribeiro	1909‍–‍1931	Died in office
	Abílio Augusto Vaz das Neves [pt]	1933‍–‍1938	Appointed Bishop of Bragança-Miranda
	José Vieira Alvernaz	1941‍–‍1950	Appointed Coadjutor Archbishop of Goa and Damão
	Alexander Edezath	1952‍–‍1975	Retired
	Joseph Kureethara	1975‍–‍1999	Died in office
	John Thattumkal SSC	2000‍–‍2009	Resigned
	Joseph Kariyil	2009‍–‍2024	Retired

The Diocese Of Cochin is blessed with fifty one independent parishes with resident priests under six ecclesiastical districts as follows

FIRST DISTRICT – FORT COCHIN FORANE
IMAGE	NAME OF THE PARISH	YEAR ESTABLISHED
	Santa Cruz Cathedral Basilica Fort Kochi	1505
	Our Lady Of Life Church Mattancherry	9th century
	Our Lady Of Hope Church Vypeen	1605
	SS Peter and Paul Church Amaravathy	1857
	Holy Family Church Nazareth	1901
	Stella Maris Church Willington Island	1955
	St Joseph's Bethlehem Church Chullicakal	1974
	St Mary's Church Kochery	2016
SECOND DISTRICT – KANNAMALY FORANE
	St Antony's Forane Church Kannamaly	1873
	St Louis Church Mundamvely	9th century
	St Sebastian's Church Chellanam	1832
	St Joseph's Church Cheriyakadavu	1968
	St Francis Assisi Church Kattiparambu	1980
	St Thomas Apostle Church Santhome	1990
	St John The Baptist Church Anjilithara	2019
THIRD DISTRICT – EDAKOCHI FORANE
	St Lawrence Church Edacochin	9th century
	St Sebastian's Church Thoppumpady	1833
	Santa Cruz Church Perumpadappu	1965
	St Joseph's Church Chirackal	1965
	St Mary's Church North Edakochi	1978
	St Lawrence Church Palluruthy	1986
	St Thomas More Church Palluruthy	1991
	St Joseph's Church Maduracompany	2012
	Santa Maria Church Perumpadappu	2018
FOURTH DISTRICT – KUMBALANGHI FORANE
	St George Church Pazhangad	1869
	St Peter's Church Kumbalanghi	1875
	St Joseph's Church North Kumbalanghi	1967
	Immaculate Conception Church Ezhupunna	1977
	St Sebastian's Church Neendakara	1977
	Sacred Heart Church Kumbalanghi	1994
	St Martin De Porres Church Kallencherry	1996
	Holy Maris Church Azhikakam	2014
	San Jose Church Ettumkal	2014
FIFTH DISTRICT – AROOR FORANE
	St Augustine's Church Aroor	1901
	St Francis Xavier Church Eramallore	1843
	St Joseph's Church Kumbalam	1977
	St Antony's Church Arookutty	1978
	St Joseph's Church Vallethode	1986
	Our Lady Of Fatima Church Kodamthuruth
	St Mary's Church Chandiroor	2004
	St Sebastian's Church Karunyapuram	2013
	Little Flower Church Perumbalam	2013
	St Jude Church Eramallor
	Queen Of Peace Church Ezhupunna	2024
SIXTH DISTRICT – THANKEY FORANE
	St Mary's Forane Church Thankey	1832
	Our Lady Of Assumption Church Poomkavu	1860
	St George Church Arthumkal	1866
	St Francis Xavier Church Vayalar	1936
	St Sebastian's Church Areeparambu	2016
	St George Church Arasupuram	2017
	St Antony's Church Pathirapally

In 9th century there were only three parishes in West Kochi: St. Lawrence Church Edakochi, Our Lady Of Life Church Mattancherry, and St. Louis Church Mundamveli.

PILGRIM AND NOVENA CENTERS

IMAGE	NAME OF THE CHURCH	VENERATION	LOCATION
	HOLY CROSS PILGRIM CENTER (COONAN KURISU) MATTANCHERRY	HOLY CROSS	<mapframe> problems: Attribute "latitude" has an invalid value Attribute "longitude" has an invalid value
	OUR LADY OF VELANKANNI SHRINE,MARUVAKAD, CHELLANAM	OUR LADY OF HEALTH
	ST JOSEPH'S MIRACULOUS SHRINE KANNAMALY	ST JOSEPH
	ST SEBASTIAN'S CHURCH EDACOCHIN,TOMB OF SERVANT OF GOD MSGR.LAWRENCE PULIYANATH	MSGR.LAWRENCE PULIYANATH (Servant Of God)

• 
  St Francis Xavier
• 
  St John De Britto
• 
  St Joseph Vaz
• 
  St Theresa Of Culcutta
• 
  St Devasahayam
• 
  Venerable Matteo Ricci
• 
  Msgr Lawrence Puliyanath

• St Francis Xavier worked in the costal belt of the diocese as a missionary,often visited the diocese.
• St John De Britto visited the diocese on his way towards his mission.
• St Joseph Vaz served the diocese as its Vicar General.
• St Theresa Of Culcutta, widley known as Mother Theresa,visited the diocese and inaugurated Cochin Institute of printing technology (CIPT Press) In Thoppumpady.
• St Devasahayam a member of the diocese during his great martyrdom.
• Venerable Matteo Ricci Ordained as a Priest in Santa Cruz Cathedral Basilica Fort Kochi.
• Servant of God Lawrence Puliyanath, a dioceasean priest who is often called as the apostle of the poor,served in the parish of St Lawrence Church Edacochin as Assistant Vicar and Later Vicar for more that 33 years.

The Diocese of Cochin preceded jurisdiction expanding from Cananore to Cape Comorin and Ceylon (now Sri Lanka) on the west Coast and the entire India East coast including Burma. The first bishop of Cochin was Dom George Temudo (1557–1567). He encroached the support of Raja of Cochin in order to sail for the establishment of educational institutions. Joseph Kureethara, the 33rd Bishop consecrated on 21 December 1975, started to form a Corporate Educational Agency for the Diocese of Cochin inline with the Kerala Educational Acts and Rules. On April 11 1979 Kureethara after sending orders, began the Corporate Educational Agency which started functioning from 1 April 1981.

Aquinas College is stepping into the year of its Ruby Jubilee Celebrations. Situated in Edakochi, just 100 metres from the State Highway, the institution is hemmed in by Palluruthy to the west, Aroor to the south and Kumbalam to the east. Established in 1981 by the Diocese of Cochin, under the guidance and patronage of His Excellency Rt Rev. Dr Joseph Kureethara, the late Bishop of Cochin, Aquinas College has been instrumental in the rapid educational progress of the youth in this area. The late Bishop envisioned the transformation of this region through this institution which would act as a centre for academics and culture.

Avila College of Education was established by the Latin Catholic Diocese of Cochin in 1995. It is presently administered by Aquinas Educational and Charitable Trust, Edacochin. The National Commission for Minority Educational Institutions Government of India has granted minority status certificate to Avila College of Edacochin by its order No. 326 of 2011/54850 dated 10th August 2011.

1. B.Ed.
2. M.Ed.

Siena College of Professional Studies is the third university affiliated College, patronized by the Bishop of Cochin. It is affiliated to the Mahatma Gandhi University, Kottayam. This is a milestone in the arena of education triggered off by Rt. Rev. Dr. Joseph Kureethara, the former Bishop of Cochin.

It was on 17th August 2002 that the Government of Kerala sanctioned the college for the Diocese of Cochin, which belongs to the Latin Catholic Community. On 4th September 2002 Mahatma Gandhi University granted the College affiliation.

On 27th September 2002 the college with the name Siena College of Professional Studies was inaugurated by Shri Nalakathu Soopy, Hon’ble Minister of Education, Kerala, in the presence of Prof. K.V. Thomas, Hon’ble Minister for Fisheries and Tourism, Kerala, Dr. Cyriac Thomas, Hon’ble Vice Chancellor of Mahatma Gandhi University, Kottayam, Rev. Fr. Joppy Koottumkal, Manager of Siena College and other dignitaries. The meeting was presided over by His Excellency, Rt. Rev. Dr. John Thattumkal.

1. BCom (Hons) Finance and Taxation 2. BCom (Hons) Finance and Taxation & Accounting 3. BCom (Hons) Accounting & Co-Operation 4. BCom (Hons) Marketing & Logistics Management 5. BA (Hons) English - Cultural Studies & Film Studies 6. Bachelor of Computer Applications (Honours) 7. BSc (Hons) Computer Science - Data Science and Analytics & Web and Mobile Technologies 8. Bachelor of Business Administration (Honours)