Anos is located some 15 km north-east of Pau and 10 km south-east of Auriac. Access to the commune is by road D39 from Morlaas in the south passing north through the commune and the village and continuing north to join the D834 just north of Astis. Several other country roads also pass through the commune.
The Lau river forms the western border of the commune with the eastern shore of the Lake of Saint-Amour (also called the Lake of Anos) forming the part just west of the village. The Lau flows north to join the Luy de France which also forms the eastern border of the commune.[4]
The commune name in Béarnais is Anòs (according to the classical norm of Occitan).
Brigitte Jobbé-Duval[8] indicates that Anos could be of Gallic origin being the name of the property owner Andus plus the suffix -ossu with a proposed meaning of "Domain of Andus".
The name Anos was mentioned in 1243[9] in the Titles of Ossau[10] and in the Cassini map in 1750[11]).
History
Paul Raymond[9] noted on page 6 of the 1863 dictionary that in the 14th century Anos belonged to the community of Preachers of Morlaàs.
The commune was part of the archdeaconry of Vic-Bihl which depended on the diocese of Lescar of which Lembeye was the capital.[9]