Place
- Accra (Ghana)5
- Addis Ababa (Ethiopia)5
- Africa2
- Ahvāz (Iran)6
- Akashi-shi (Japan)5
- Alabama12
- Alameda County (Calif.)16
- Alaska12
- Albemarle Sound (N.C.)7
- Albion River Watershed (Calif.)16
- Alexandria (Egypt)5
- Algeria1
- Algiers (Algeria)4
- Amador County (Calif.)1
- Anqing Shi (China)5
- Ansan-si (Kyŏnggi-do, Korea)5
- Antarctic Ocean2
- Antarctica1
- Arctic Ocean239
- Argentina2