| Alt Àneu | |
| Settlement Type: | Municipality |
| Pushpin Map: | Spain Catalonia vegueries#Spain |
| Coordinates: | 42.6353°N 1.1111°W |
| Subdivision Type: | Sovereign state |
| Subdivision Name: |  Spain |
| Subdivision Type1: | Community |
| Subdivision Type2: | Region |
| Subdivision Name2: | Alt Pirineu |
| Subdivision Type3: | County |
| Subdivision Name3: | Pallars Sobirà |
| Subdivision Type4: | Province |
| Subdivision Name4: | Lleida |
| Leader Title: | Mayor |
| Leader Name: | Laura Tristán (ERC (2015) |
| Area Footnotes: | [1] |
| Area Total Km2: | 217.8 |
| Elevation M: | 1076 |
| Population Density Km2: | auto |
Alt Àneu is a town and municipality in Pallars Sobirà county in Catalonia.
It is the largest municipality in Catalonia in terms of area at 1913.79sqkm, with a population in 2022 of 441.[2] It is situated by the Noguera Pallaresa river, and is served by the C-13 road, which links it with county capital Sort and to the Aran Valley over the Port de la Bonaigua (2072 m). The ajuntament (town hall) is in València d'Àneu.
The municipality of Alt Àneu is formed of nine villages. Populations are given as of 2005:
| Pop 1900: | 1146 |
| Pop 1930: | 1078 |
| Pop 1950: | 800 |
| Pop 1970: | 480 |
| Pop 1986: | 333 |
| Pop Latest: | 450 |
| Latest Year: | 2007 |