| Surname | Named after | location | Mean diameter (km) |
Name valid since |
|---|---|---|---|---|
| Aban | Aban , place in Russia | 15.91 ° N , 111.1 ° EMars 15.91 111.1 | 4.28 | 1988 |
| Achar | Achar , place in Uruguay | 45.43 ° N , 123.16 ° OMars 45.43 123.16 | 5.36 | 1979 |
| Ada | Ada , city in Oklahoma , USA | 3.06 ° S , 3.22 ° WMars -3.06 -3.22 | 2.09 | Sep 14 2006 |
| Adams | Walter Sydney Adams (1876–1956), American. astronomer | 30.91 ° N , 163.1 ° OMars 30.91 163.1 | 90.22 | 1973 |
| Agassiz | Louis Agassiz (1807–1873), American. Naturalist | 69.88 ° S , 88.89 ° WMars -69.88 -88.89 | 108.77 | 1973 |
| Airy | George Biddell Airy (1801-1892), British astronomer | 5.14 ° S , 0.05 ° OMars -5.14 0.05 | 43.05 | 1973 |
| Airy-0 | small crater inside Airy (Mars crater) , defines the prime meridian of Mars | 5.07 ° S , 0 ° EMars -5.07 0 | 0.79 | 2003 |
| Ajon | Aion , place in Russia | 16.49 ° N , 103.14 ° OMars 16.49 103.14 | 8.08 | 1988 |
| Aki | Aki , city in Japan | 35.46 ° S , 60.24 ° WMars -35.46 -60.24 | 7.87 | 1979 |
| Aktaj | Aktai , place in Russia | 20.41 ° N , 46.49 ° WMars 20:41 -46.49 | 5.01 | 1988 |
| Alamos | Álamos , city in Mexico | 23.48 ° N , 37.12 ° WMars 23.48 -37.12 | 6.44 | Sep 14 2006 |
| Albany | Albany , city in New York , USA | 22.96 ° N , 49.02 ° WMars 22.96 -49.02 | 2.15 | 1979 |
| Albi | Albi , city in France | 41.47 ° S , 35.01 ° WMars -41.47 -35.01 | 9.07 | 1976 |
| Alexey Tolstoy | Alexei Nikolajewitsch Tolstoy (1883–1945), Soviet writer | 47.44 ° S , 125.34 ° OMars -47.44 125.34 | 93.04 | 1982 |
| Alga | Algha , city in Kazakhstan | 24.34 ° S , 26.68 ° WMars -24.34 -26.68 | 18.72 | 1976 |
| Alitus | Alytus , city in Lithuania | 34.91 ° S , 38.14 ° WMars -34.91 -38.14 | 50 | 1979 |
| Amsterdam | Amsterdam , capital of the Netherlands | 23 ° N , 47 ° WMars 23 -47 | 1.66 | 1979 |
| Angu | Angu , place in Democratic Republic of the Congo | 20.01 ° N , 105.64 ° OMars 1/20 105.64 | 2.08 | 1988 |
| Aniak | Aniak , location in Alaska , USA | 31.84 ° S , 69.56 ° WMars -31.84 -69.56 | 50.97 | 1979 |
| Annapolis | Annapolis , city in Maryland , USA | 23.16 ° N , 47.73 ° WMars 23.16 -47.73 | 1.11 | 1979 |
| Antoniadi | Eugène Michel Antoniadi (1870–1944), Greco-French. astronomer | 21.38 ° N , 60.83 ° OMars 21.38 60.83 | 400.95 | 1973 |
| Apia | Apia , capital of Samoa | 37.28 ° S , 89.02 ° OMars -37.28 89.02 | 10.06 | 1991 |
| Apt | Apt , city in France | 39.88 ° N , 9.47 ° WMars 39.88 -9.47 | 9.57 | 1976 |
| Arago | François Arago (1786-1853), French. astronomer | 10.22 ° N , 29.93 ° EMars 10.22 29.93 | 152.35 | 1973 |
| Arandas | Arandas , city in Mexico | 42.41 ° N , 15.03 ° WMars 42.41 -15.03 | 24.76 | 1976 |
| Argas | Argas , place in Russia | 23.33 ° N , 50.17 ° WMars 23.33 -50.17 | 3.55 | 1988 |
| Arica | Arica , place in Colombia | 23.8 ° S , 110.24 ° OMars -23.8 110.24 | 15.77 | 1991 |
| Arima | Arima , city in Trinidad and Tobago | 15.84 ° S , 63.68 ° WMars -15.84 -63.68 | 53.59 | February 22, 2012 |
| Arkhangelsky | Andrei Dmitrijewitsch Archangelski (1879–1940), Russian geologist | 41.09 ° S , 24.79 ° WMars -41.09 -24.79 | 116.83 | 1979 |
| Arrhenius | Svante Arrhenius (1859–1927), Swedish physicist and chemist | 40.04 ° S , 122.71 ° OMars -40.04 122.71 | 122.72 | 1973 |
| Arta | Arta , place in Russia | 21.38 ° N , 54.29 ° WMars 21.38 -54.29 | 3.96 | 1988 |
| Artic | Artik , city in Armenia | 34.8 ° S , 130.98 ° OMars -34.8 130.98 | 5.36 | August 30, 2013 |
| Asau | Asau , village in Tuvalu | 3.63 ° S , 154.68 ° OMars -3.63 154.68 | 25.05 | 3rd June 2013 |
| Asimov | Isaac Asimov (1920-1992), American. Biochemist and writer | 46.97 ° S , 4.93 ° EMars -46.97 4.93 | 80.82 | May 4, 2009 |
| Aspen | Aspen , city in Colorado , USA | 21.39 ° S , 23.15 ° WMars -21.39 -23.15 | 18.48 | 1976 |
| Avarua | Avarua , capital of the Cook Islands | 35.93 ° S , 109.66 ° OMars -35.93 109.66 | 49.99 | June 21, 2010 |
| Aveiro | Aveiro , city in Portugal | 21.28 ° N , 78.97 ° WMars 21.28 -78.97 | 9.11 | 1985 |
| Avire | Avire , place in Vanuatu | 40.82 ° S , 159.76 ° WMars -40.82 -159.76 | 6.85 | April 16, 2008 |
| Ayacucho | Ayacucho , place in Bolivia | 38.18 ° N , 92.03 ° WMars 38.18 -92.03 | 2.59 | 1991 |
| Ayr | Ayr , location in Queensland , Australia | 38.98 ° S , 91.58 ° OMars -38.98 91.58 | 12.74 | 1991 |
| Azul | Azul , city in Argentina | 42.07 ° S , 42.51 ° WMars -42.07 -42.51 | 19.53 | 1976 |
| Azusa | Azusa , city in California , USA | 5.48 ° S , 40.32 ° WMars -5.48 -40.32 | 39.25 | 1976 |
