| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Obval | city | Penzenskaya Oblast' | Russia | 52.75 | 43.25 | 606 | 1993 |
| Ogarevka | city | Penzenskaya Oblast' | Russia | 52.5833333 | 44.95 | 675 | 882 |
| Ogarevka | city | Penzenskaya Oblast' | Russia | 52.4833333 | 45.4166667 | 780 | 1022 |
| Ogarëvka | city | Penzenskaya Oblast' | Russia | 52.5833333 | 44.95 | 675 | 882 |
| Ogarëvka | city | Penzenskaya Oblast' | Russia | 52.4833333 | 45.4166667 | 780 | 1022 |
| Oktyabr'skaya | city | Penzenskaya Oblast' | Russia | 53.05 | 43.0666667 | 656 | 1542 |
| Oktyabr'skaya | city | Penzenskaya Oblast' | Russia | 52.85 | 44.9333333 | 856 | 1332 |
| Oktyabr'skiy | city | Penzenskaya Oblast' | Russia | 53.05 | 43.0666667 | 656 | 1542 |
| Oktyabr'skoye | city | Penzenskaya Oblast' | Russia | 52.8666667 | 46.5 | 672 | 1797 |
| Ol'gina-Macha | city | Penzenskaya Oblast' | Russia | 52.6847222 | 43.6569444 | 754 | 2050 |
| Ol'khovka | city | Penzenskaya Oblast' | Russia | 53.5230556 | 42.4311111 | 515 | 1825 |
| Ol'kovyy | city | Penzenskaya Oblast' | Russia | 53.3408333 | 43.4658333 | 790 | 1519 |
| Ol'shanka | city | Penzenskaya Oblast' | Russia | 53.4727778 | 42.9191667 | 616 | 1467 |
| Ol'shanka | city | Penzenskaya Oblast' | Russia | 52.8641667 | 43.0822222 | 593 | 1483 |
| Ol'shanka | city | Penzenskaya Oblast' | Russia | 52.4833333 | 43.1833333 | 620 | 1627 |
| Ol'shanka | city | Penzenskaya Oblast' | Russia | 53.0833333 | 45.0166667 | 695 | 23835 |
| Olenevka | city | Penzenskaya Oblast' | Russia | 52.9666667 | 44.9 | 656 | 2077 |
| Orlovka | city | Penzenskaya Oblast' | Russia | 53.4383333 | 42.8969444 | 501 | 1521 |
| Orlovka | city | Penzenskaya Oblast' | Russia | 53.9463889 | 43.6827778 | 492 | 1554 |
| Orlovka | city | Penzenskaya Oblast' | Russia | 52.5666667 | 44.3333333 | 623 | 1280 |
| Ostrovtsy | city | Penzenskaya Oblast' | Russia | 52.8166667 | 44.45 | 521 | 1727 |
| Otorma | city | Penzenskaya Oblast' | Russia | 53.5358333 | 42.4963889 | 462 | 1825 |
| Otrada | city | Penzenskaya Oblast' | Russia | 53.2166667 | 44.3833333 | 866 | 1369 |
| Otrada | city | Penzenskaya Oblast' | Russia | 52.65 | 44.8666667 | 803 | 1484 |
| Ovcharnoye | city | Penzenskaya Oblast' | Russia | 53.5166667 | 43.75 | 570 | 1198 |
| Ovcharnya | city | Penzenskaya Oblast' | Russia | 53.6333333 | 42.9666667 | 541 | 1358 |
| Ozerka | city | Penzenskaya Oblast' | Russia | 53.4886111 | 46.465 | 984 | 1371 |
| Ozerki | city | Penzenskaya Oblast' | Russia | 52.6333333 | 43.3 | 626 | 1999 |
| Ozerki | city | Penzenskaya Oblast' | Russia | 53.4 | 44.2333333 | 672 | 1342 |
| Ozerki | city | Penzenskaya Oblast' | Russia | 52.8333333 | 45.9666667 | 938 | 1267 |
| Ozerki | city | Penzenskaya Oblast' | Russia | 53.4886111 | 46.465 | 984 | 1371 |
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