- Andrews AFB (Maryland)7
- Angaur, Palau2
- Anglezarke Mine, Chorley, Lancashire, England, United Kingdom1
- Ann Arbor, Washtenaw County, Michigan, United States11
- Annapolis (Md.)2
- Annapolis, Anne Arundel County, Maryland, United States3
- Anningsley, England5
- Anniston Army Depot (Ala.)1
- Anson County (N.C.)2
- Antarctica3
- Antwerp, Jefferson County, New York, United States1
- Apalache (S.C.)1
- Apalachicola8
- Apalachicola (Fla.)6
- Appomattox (Va.)1
- Apra Harbor2
- Aragon, Spain1
- Aransas Pass (Tex.)1
- Arcadia (S.C.)1
- Arcadia, Los Angeles County, California, United States1