| Name | Benannt nach | Lage | Mittlerer
Durchmesser (km) |
|---|
| Oberth | Hermann Oberth | 62° 24′ 0″ N, 155° 24′ 0″ OMoon62.4155.4 | 60 |
| Obruchev | Vladimir A. Obruchev | 38° 54′ 0″ S, 162° 6′ 0″ OMoon-38.9162.1 | 71 |
| O’Day | Marcus O’Day | 30° 36′ 0″ S, 157° 30′ 0″ OMoon-30.6157.5 | 71 |
| Oenopides | Önopides von Chios | 57° 0′ 0″ N, 64° 6′ 0″ WMoon57-64.1 | 67 |
| Oersted | Hans Christian Ørsted | 43° 6′ 0″ N, 47° 12′ 0″ OMoon43.147.2 | 42 |
| Ohm | Georg Simon Ohm | 18° 24′ 0″ N, 113° 30′ 0″ WMoon18.4-113.5 | 64 |
| Oken | Lorenz Okenfuss | 43° 42′ 0″ S, 75° 54′ 0″ OMoon-43.775.9 | 71 |
| Olbers | Heinrich Wilhelm Malthaus Olbers | 7° 24′ 0″ N, 75° 54′ 0″ WMoon7.4-75.9 | 74 |
| Olcott | William Tyler Olcott | 20° 36′ 0″ N, 117° 48′ 0″ OMoon20.6117.8 | 81 |
| Olivier | Charles Pollard Olivier | 59° 6′ 0″ N, 138° 30′ 0″ OMoon59.1138.5 | 69 |
| Omar Khayyam | Omar Chayyām | 58° 0′ 0″ N, 102° 6′ 0″ WMoon58-102.1 | 70 |
| Onizuka | Ellison Shoji Onizuka | 36° 12′ 0″ S, 148° 54′ 0″ WMoon-36.2-148.9 | 29 |
| Opelt | Friedrich Wilhelm Opelt | 16° 18′ 0″ S, 17° 30′ 0″ WMoon-16.3-17.5 | 48 |
| Oppenheimer | Robert Oppenheimer | 35° 12′ 0″ S, 166° 18′ 0″ WMoon-35.2-166.3 | 208 |
| Oppolzer | Theodor Egon von Oppolzer | 1° 30′ 0″ S, 0° 30′ 0″ WMoon-1.5-0.5 | 40 |
| Oresme | Nikolaus von Oresme | 42° 24′ 0″ S, 169° 12′ 0″ OMoon-42.4169.2 | 76 |
| Orlov | Alexander Jakowlewitsch Orlow
Sergei Wladimirowitsch Orlow | 25° 42′ 0″ S, 175° 0′ 0″ WMoon-25.7-175 | 81 |
| Orontius | Orontius Finnaeus | 40° 36′ 0″ S, 4° 36′ 0″ WMoon-40.6-4.6 | 105 |
| Osama | arabischer Männername | 18° 36′ 0″ N, 5° 12′ 0″ OMoon18.65.2 | 0.5 |
| Osiris | agyptischer Männername | 18° 36′ 0″ N, 27° 36′ 0″ OMoon18.627.6 | 1 |
| Osman | türkischer Männername | 11° 0′ 0″ S, 6° 12′ 0″ WMoon-11-6.2 | 2 |
| Ostwald | Wilhelm Ostwald | 10° 24′ 0″ N, 121° 54′ 0″ OMoon10.4121.9 | 104 |