Alta
- Accelerated life testing
- Acqua alta
- Alt-A
- Alta (dye)
- Alta (novel)
- Alta (poet)
- Alta (river)
- Alta (town)
- Alta (vehicles)
- Alta Airport
- Alta Bike Share
- Alta California
- Alta Car and Engineering Company
- Alta Church
- Alta Cohen
- Alta Group Newspapers
- Alta IF
- Alta Lake (British Columbia)
- Alta Lake State Park
- Alta Lake, British Columbia
- Alta Museum
- Alta Newspaper Group
- Alta Records
- Alta Ski Area
- Alta capella
- Alta, California
- Alta, Fayette County, West Virginia
- Alta, Greenbrier County, West Virginia
- Alta, Illinois
- Alta, Indiana
- Alta, Iowa
- Alta, Norway
- Alta, Utah
- Alta, Wyoming
- AltaVista
- Altaelva
- Altamont (disambiguation)
- Alto (disambiguation)
- American Land Title Association
- American Literary Translators Association
- Amur leopard
- Arta (disambiguation)
- Atlanta Lawn Tennis Association
- Australasian Language Technology Association
- Donna Leon
- List of former ski areas of Quebec
- MV Alta
- River of Golden Dreams
- Saltarello
- Treno Alta Velocità
- Älta