| Arrens-Marsous | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason_Ville_fr_Arrens-Marsous (65).svg |
| Arrondissement: | Argelès-Gazost |
| Canton: | La Vallée des Gaves |
| Insee: | 65032 |
| Postal Code: | 65400 |
| Mayor: | Jean-Pierre Cazaux[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pyrénées Vallées des Gaves |
| Coordinates: | 42.9564°N -0.2117°W |
| Elevation Min M: | 720 |
| Elevation Max M: | 3144 |
| Area Km2: | 100.55 |
Arrens-Marsous (pronounced as /fr/; oc|Arrens e Marçós) is a commune in the Hautes-Pyrénées department in southwestern France.[2] It was created in 1973 by the merger of two former communes: Arrens and Marsous.[3]
In the village, the Maison du Val d'Azun is an information centre and small museum of the area.
Arrens-Marsous has an oceanic climate (Köppen climate classification Cfb). The average annual temperature in Arrens-Marsous is . The average annual rainfall is with November as the wettest month. The temperatures are highest on average in July, at around, and lowest in January, at around . The highest temperature ever recorded in Arrens-Marsous was on 20 July 1989; the coldest temperature ever recorded was on 14 January 1985.