Agnos (French pronunciation: [aɲɔs]; Occitan: Anhòs) is a commune in the Pyrénées-Atlantiques department in the Nouvelle-Aquitaine region in southwestern France. Agnos is part of the urban area (unité urbaine) of Oloron-Sainte-Marie.

The inhabitants of the commune are known as Agnosiens or Agnosiennes.

Agnos is located just 2 km south of Oloron-Sainte-Marie and some 25 km southwest of Pau. It can be accessed on the D155 road from Bidos in the northeast coming southwest to the village then continuing southeast to Gurmençon. The D555 road also passes through the commune from the north and joins the D155 northeast of the village. The commune is mixed farmland and forests with the forests scattered throughout the commune.

The river Mielle, a tributary of the Gave d'Oloron (Adour basin), flows through the commune.

The commune name in béarnais is Anhos. Michel Grosclaude suggested that Agnos came from a Latin man's name Annius with an Aqitaine suffix -ossum the whole meaning "domain of Annius".

The following table details the origins of the commune name and other names in the commune.

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Origins: