Aubin is located some 35 km east by south-east of Orthez and 20 km north of Pau. The A65 autoroute passes through the commune but there is no exit in or near the commune with the nearest exit being Exit 9 south of Lalonquette or the beginning of the motorway just north of Lescar. Access to the commune is by the D210 road from Bournos in the east which goes to the village. The D216 from Sauvagnon in the south-east passes through the south of the commune on its way to Momas in the north-west. Country roads are also available to access the commune. There are some scattered forests in the commune but most of it is farmland.

The Luy de Béarn forms the south-western border of the commune as it flows north-west to join the Luy de France near Vieux-Bourg to become the Luy. The Aubiosse river flows through the south of the commune from east to west and joins the Luy de Béarn south-west of the commune. The Gez river forms the north-eastern border of the commune as it flows north-west to join the Luy de Béarn.

The commune name in béarnais is Aubin. Michel Grosclaude proposed an etymology of the Latin man's name Albius with the suffix -inum (Albinum), the whole meaning "Domain of Albius".

The following table details the origins of the commune name:

Sources:

• Raymond: Topographic Dictionary of the Department of Basses-Pyrenees, 1863, on the page numbers indicated in the table. (in French)
• Grosclaude: Toponymic Dictionary of communes, Béarn, 2006 (in French)

Origins:

• Lescar: Cartulary of Lescar
• Fors de Béarn
• Census: Census of Béarn

The village is first mentioned in 1101 as Sanctus-Genumer-de-Albii. At the start of the 11th century, the village and its church were given to the Bishop of Lescar by the wife of Viscount Centulle III.[1]

Paul Raymond noted on page 16 of the 1863 dictionary that in 1385 Aubin had 17 fires and depended on the bailiwick of Pau. Bournos was also annexed to the parish of Aubin, the former archpriest of the Diocese of Lescar.

This list is incomplete; you can help by adding missing items. (April 2021)

List of Successive Mayors

The commune is part of four inter-communal structures:

• the Communauté de communes des Luys en Béarn;
• the Energy association of Pyrénées-Atlantiques;
• the inter-communal association for the management of drinking water for Luy - Gabas -Lées;
• the inter-communal association of Aubin-Doumy-Bournos.

In 2017 the commune had 239 inhabitants.

Historical population

Year Pop. ±% p.a. 1793 308 —     1800 282 −1.25% 1806 277 −0.30% 1821 370 +1.95% 1831 382 +0.32% 1836 368 −0.74% 1841 350 −1.00% 1846 365 +0.84% 1851 352 −0.72% 1856 351 −0.06% 1861 306 −2.71% 1866 286 −1.34% 1872 268 −1.08% 1876 270 +0.19% 1881 244 −2.00% 1886 218 −2.23% 1891 208 −0.93% 1896 191 −1.69%	Year Pop. ±% p.a. 1901 196 +0.52% 1906 176 −2.13% 1911 170 −0.69% 1921 151 −1.18% 1926 156 +0.65% 1931 156 +0.00% 1936 153 −0.39% 1946 123 −2.16% 1954 121 −0.20% 1962 115 −0.63% 1968 113 −0.29% 1975 110 −0.38% 1982 159 +5.40% 1990 199 +2.84% 1999 183 −0.93% 2007 228 +2.79% 2012 254 +2.18% 2017 239 −1.21%
Graphs are unavailable due to technical issues. Updates on reimplementing the Graph extension, which will be known as the Chart extension, can be found on Phabricator and on MediaWiki.org.
Source: EHESS and INSEE

The commune has a number of buildings and structures that are registered as historical monuments:

• A Farmhouse at Cambatu (17th century)
• Houses and Farms (17th century)
• A Fortified Complex named Castetbielh ("Old Castle") (High Middle Ages) - https://web.archive.org/web/20170205013449/http://visites.aquitaine.fr/ensemble-fortifie-castetbielh

The commune has a church that is registered as a historical monument:

• The Parish Church of Saint Germain-d'Auxerre (12th century). The Church contains many items that are registered as historical objects, some of which were destroyed when the church was renovated in 1981:
  • Furniture in the Church
  • Furniture in the Church (Supplementary list)
  • A Mural Painting (1897) (Destroyed in 1981).
  • A Lectern (18th century)
  • A Pulpit (1897)
  • A Confessional (18th century)
  • An Altar, Altar seating, Tabernacle, statue, 4 Altar candlesticks (17th century)
  • An Altar, 2 rows of Altar seating, Tabernacle, 4 Altar candlesticks, Altar Cross (19th century) (All destroyed in 1981)
  • 5 Hilarri (1859)

Aubin has a primary school which is shared with Bournos, Auga, and Doumy as an inter-communal educational grouping.

• Communes of the Pyrénées-Atlantiques department

• Community of communes of Luys en Béarn website (in French)
• Aubin on Géoportail, National Geographic Institute (IGN) website (in French)
• Aubin on the 1750 Cassini Map

Wikimedia Commons has media related to Aubin (Pyrénées-Atlantiques).