| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| 올골 | city | Gyeongbuk | Korea, Republic of (South) | 35.69 | 129.45 | 55 | 6008 |
| 올금당 | city | Gyeongbuk | Korea, Republic of (South) | 36.17 | 129.24 | 830 | 17582 |
| 올네수부아 | city | France | 48.94 | 2.49 | 150 | 425185 | |
| 올더숏 | city | Hampshire | United Kingdom | 51.25 | -0.77 | 249 | 131255 |
| 올덤 | city | Oldham | United Kingdom | 53.55 | -2.12 | 830 | 135575 |
| 올덴부르크 | city | Niedersachsen | Germany | 53.14 | 8.21 | 19 | 106764 |
| 올라프스비크 | city | Vesturland | Iceland | 64.89 | -23.72 | 305 | 637 |
| 올라프스피외르뒤르 | city | Nordhurland Eystra | Iceland | 66.07 | -18.64 | 1738 | 614 |
| 올랜도 | city | Florida | United States | 28.54 | -81.38 | 111 | |
| 올레순 | city | More og Romsdal | Norway | 62.47 | 6.15 | 9 | 27683 |
| 올로네츠 | city | Kareliya | Russia | 60.98 | 32.97 | 82 | 447 |
| 올로모우츠 | city | Olomoucky Kraj | Czech Republic | 49.59 | 17.25 | 830 | 57054 |
| 올롱가포 | city | Olongapo | Philippines | 14.84 | 120.29 | 190 | 111556 |
| 올리벤사 | city | Extremadura | Spain | 38.68 | -7.10 | 856 | 4985 |
| 올린다 | city | Pernambuco | Brazil | -8.02 | -34.85 | 0 | 438511 |
| 올림피아 | city | Washington | United States | 47.04 | -122.90 | 91 | |
| 올메기 | city | Chungnam | Korea, Republic of (South) | 36.61 | 126.29 | 42 | 3420 |
| 올목 | city | Chungbuk | Korea, Republic of (South) | 36.28 | 127.65 | 830 | 11469 |
| 올미 | city | Gangwon | Korea, Republic of (South) | 37.93 | 127.74 | 262 | 84194 |
| 올미 | city | Gyeongbuk | Korea, Republic of (South) | 35.86 | 128.11 | 1669 | 7716 |
| 올미골 | city | Gyeongbuk | Korea, Republic of (South) | 37.03 | 129.31 | 830 | 6556 |
| 올버니 | city | Western Australia | Australia | -35.00 | 117.87 | 314 | 22128 |
| 올버니 | city | Georgia | United States | 31.58 | -84.16 | 203 | |
| 올버니 | city | New York | United States | 42.65 | -73.76 | 68 | |
| 올버니 | city | California | United States | 37.89 | -122.30 | 85 | |
| 올보르 | city | Nordjylland | Denmark | 57.04 | 9.94 | 91 | 25565 |
| 올족리 | city | Hamnam | Korea, Dem. Peoples Rep. of (North) | 40.90 | 128.85 | 3533 | 11026 |
| 올텐 | city | Solothurn | Switzerland | 47.36 | 7.91 | 1669 | 58264 |