| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Obltop | city | Chitinskaya Oblast' | Russia | 51.74 | 113.81 | 2244 | 298 |
| Obor | city | Chitinskaya Oblast' | Russia | 50.98 | 108.55 | 2322 | 0 |
| Obshivkovo | city | Chitinskaya Oblast' | Russia | 50.57 | 110.53 | 3087 | 0 |
| Obshivnovo | city | Chitinskaya Oblast' | Russia | 50.57 | 110.53 | 3087 | 0 |
| Ochukonda | city | Chitinskaya Oblast' | Russia | 53.17 | 117.47 | 2568 | 298 |
| Ochunonda | city | Chitinskaya Oblast' | Russia | 53.17 | 117.47 | 2568 | 298 |
| Okoronda | city | Chitinskaya Oblast' | Russia | 53.17 | 118.15 | 1929 | 298 |
| Oktyabr'skiy | city | Chitinskaya Oblast' | Russia | 50.08 | 118.18 | 2345 | 2679 |
| Oktyabr’skiy | city | Chitinskaya Oblast' | Russia | 50.08 | 118.18 | 2345 | 2679 |
| Okurei | city | Chitinskaya Oblast' | Russia | 52.37 | 117.03 | 1686 | 298 |
| Oldonda | city | Chitinskaya Oblast' | Russia | 50.88 | 116.93 | 2916 | 0 |
| Olekan | city | Chitinskaya Oblast' | Russia | 52.37 | 116.07 | 1801 | 447 |
| Olenguy | city | Chitinskaya Oblast' | Russia | 51.31 | 113.41 | 2352 | 298 |
| Olinsk | city | Chitinskaya Oblast' | Russia | 52.40 | 116.22 | 1650 | 447 |
| Olinskoe | city | Chitinskaya Oblast' | Russia | 52.40 | 116.22 | 1650 | 447 |
| Olinskoye | city | Chitinskaya Oblast' | Russia | 52.40 | 116.22 | 1650 | 447 |
| Olocha | city | Chitinskaya Oblast' | Russia | 51.35 | 119.92 | 1601 | 244 |
| Olochi | city | Chitinskaya Oblast' | Russia | 51.35 | 119.92 | 1601 | 244 |
| Olovyannaya | city | Chitinskaya Oblast' | Russia | 50.95 | 115.57 | 1929 | 715 |
| Olovyanraya | city | Chitinskaya Oblast' | Russia | 50.95 | 115.57 | 1929 | 715 |
| Olukuchag | city | Chitinskaya Oblast' | Russia | 49.57 | 111.78 | 3133 | 149 |
| Omoroi | city | Chitinskaya Oblast' | Russia | 52.97 | 118.97 | 1364 | 149 |
| Omoroy | city | Chitinskaya Oblast' | Russia | 52.97 | 118.97 | 1364 | 149 |
| Ongontson | city | Chitinskaya Oblast' | Russia | 50.25 | 112.98 | 2975 | 149 |
| Ongotson | city | Chitinskaya Oblast' | Russia | 50.25 | 112.98 | 2975 | 149 |
| Onkhoyek | city | Chitinskaya Oblast' | Russia | 50.35 | 113.03 | 2631 | 149 |
| Onkoyek | city | Chitinskaya Oblast' | Russia | 50.35 | 113.03 | 2631 | 149 |
| Onokhoi | city | Chitinskaya Oblast' | Russia | 51.33 | 119.85 | 1653 | 190 |
| Onokhovo | city | Chitinskaya Oblast' | Russia | 51.62 | 116.80 | 2257 | 149 |
| Onokhoy | city | Chitinskaya Oblast' | Russia | 51.33 | 119.85 | 1653 | 190 |
| Onon | city | Chitinskaya Oblast' | Russia | 51.48 | 115.95 | 1758 | 727 |
| Onon | city | Chitinskaya Oblast' | Russia | 50.98 | 115.57 | 1958 | 618 |
| Onon | city | Chitinskaya Oblast' | Russia | 51.72 | 115.81 | 1643 | 745 |
| Onon | city | Chitinskaya Oblast' | Russia | 51.70 | 115.82 | 1738 | 745 |
| Onon-Borzya | city | Chitinskaya Oblast' | Russia | 51.07 | 117.33 | 2867 | 149 |
| Ononskoye | city | Chitinskaya Oblast' | Russia | 51.48 | 115.95 | 1758 | 727 |
| Ononskoye | city | Chitinskaya Oblast' | Russia | 50.98 | 115.57 | 1958 | 618 |
| Orlovskiy | city | Chitinskaya Oblast' | Russia | 51.65 | 114.33 | 2112 | 298 |
| Orotsa | city | Chitinskaya Oblast' | Russia | 51.90 | 114.83 | 2565 | 298 |
| Oroy | city | Chitinskaya Oblast' | Russia | 50.17 | 113.73 | 2808 | 149 |
| Orsuk | city | Chitinskaya Oblast' | Russia | 50.95 | 108.82 | 2224 | 0 |
| Orsun | city | Chitinskaya Oblast' | Russia | 50.95 | 108.82 | 2224 | 0 |
| Orta | city | Chitinskaya Oblast' | Russia | 51.25 | 112.38 | 2477 | 149 |
| Ortinskaya | city | Chitinskaya Oblast' | Russia | 51.25 | 112.38 | 2477 | 149 |
| Osinovka | city | Chitinskaya Oblast' | Russia | 50.57 | 109.45 | 2749 | 0 |
| Ostrovki | city | Chitinskaya Oblast' | Russia | 52.07 | 115.98 | 2155 | 745 |
| Otdeleniye Sovkhoz Ononskiy Tret'ye | city | Chitinskaya Oblast' | Russia | 51.47 | 115.77 | 1751 | 699 |
| Otpor | city | Chitinskaya Oblast' | Russia | 49.63 | 117.32 | 2247 | 17164 |
| Otto-Kondui | city | Chitinskaya Oblast' | Russia | 52.45 | 113.30 | 3077 | 126 |
| Otto-Konduy | city | Chitinskaya Oblast' | Russia | 52.45 | 113.30 | 3077 | 126 |
| Otto-Kundui | city | Chitinskaya Oblast' | Russia | 52.45 | 113.30 | 3077 | 126 |
| Ovtsevodcheskaya Tovarnaya Ferma | city | Chitinskaya Oblast' | Russia | 51.45 | 113.99 | 2217 | 298 |
| Ovtsevodcheskaya Tovarnaya Ferma | city | Chitinskaya Oblast' | Russia | 51.43 | 113.89 | 2293 | 298 |
| Ovtsevodcheskaya Tovarnaya Ferma | city | Chitinskaya Oblast' | Russia | 51.45 | 113.91 | 2526 | 298 |
| Ovtsevodcheskaya Tovarnaya Ferma Boytsekan | city | Chitinskaya Oblast' | Russia | 51.43 | 113.89 | 2293 | 298 |
| Ovtsevodcheskaya Tovarnaya Ferma Kutanda | city | Chitinskaya Oblast' | Russia | 51.45 | 113.91 | 2526 | 298 |
| Ovtsevodcheskaya Tovarnaya Ferma Malaya Tura | city | Chitinskaya Oblast' | Russia | 51.45 | 113.99 | 2217 | 298 |
| Ovtsevodcheskaya Tovarnaya Ferma Zatunga | city | Chitinskaya Oblast' | Russia | 51.45 | 113.51 | 2273 | 298 |
| Ozerinskoye | city | Chitinskaya Oblast' | Russia | 52.80 | 117.57 | 2365 | 281 |
| Ozhuk' | city | Chitinskaya Oblast' | Russia | 50.95 | 108.82 | 2224 | 0 |
| Ozhuk’ | city | Chitinskaya Oblast' | Russia | 50.95 | 108.82 | 2224 | 0 |
| Ozërnoye | city | Chitinskaya Oblast' | Russia | 52.80 | 117.57 | 2365 | 281 |