The arrondissement of Oloron-Sainte-Marie is an arrondissement of France in the Pyrénées-Atlantiques department in the Nouvelle-Aquitaine region.

[2] Its population is 71,686 (2021), and its area is 2,828.2 km2 (1,092.0 sq mi).

[3] The communes of the arrondissement of Oloron-Sainte-Marie, and their INSEE codes, are:[2] The arrondissement of Oloron-Sainte-Marie was created in 1800.

[5] As a result of the reorganisation of the cantons of France which came into effect in 2015, the borders of the cantons are no longer related to the borders of the arrondissements.

The cantons of the arrondissement of Oloron-Sainte-Marie were, as of January 2015:[6]