Place
- Accra (Ghana)3
- Addis Ababa (Ethiopia)3
- Africa3
- Ahvāz (Iran)3
- Akashi-shi (Japan)3
- Alabama14
- Alameda County (Calif.)1
- Alaska11
- Albemarle Sound (N.C.)4
- Albion River Watershed (Calif.)11
- Alexandria (Egypt)4
- Algeria1
- Algiers (Algeria)3
- Amador County (Calif.)1
- Anqing Shi (China)3
- Ansan-si (Kyŏnggi-do, Korea)3
- Antarctic Ocean2
- Antarctica1
- Arctic Ocean57
- Argentina2