| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| O-ch'on | city | Korea, Dem. Peoples Rep. of (North) | 37.97 | 125.58 | 147 | 15248 | |
| O-ch’on | city | Korea, Dem. Peoples Rep. of (North) | 37.97 | 125.58 | 147 | 15248 | |
| O-ri | city | Korea, Dem. Peoples Rep. of (North) | 39.62 | 125.53 | 39 | 27679 | |
| Obong-dong | city | Korea, Dem. Peoples Rep. of (North) | 39.75 | 127.23 | 255 | 18705 | |
| Obong-gol | city | Korea, Dem. Peoples Rep. of (North) | 39.75 | 127.23 | 255 | 18705 | |
| Obong-kol | city | Korea, Dem. Peoples Rep. of (North) | 39.75 | 127.23 | 255 | 18705 | |
| Obong-ni | city | Korea, Dem. Peoples Rep. of (North) | 38.53 | 125.98 | 830 | 22336 | |
| Odok-tong | city | Korea, Dem. Peoples Rep. of (North) | 38.22 | 124.97 | 108 | 19028 | |
| Odŏng-ni | city | Korea, Dem. Peoples Rep. of (North) | 38.63 | 126.12 | 830 | 22054 | |
| Oe-dong | city | Korea, Dem. Peoples Rep. of (North) | 38.00 | 125.32 | 232 | 20990 | |
| Oeam-dong | city | Korea, Dem. Peoples Rep. of (North) | 38.47 | 125.47 | 68 | 31387 | |
| Oemokch'ong-ni | city | Korea, Dem. Peoples Rep. of (North) | 41.32 | 127.78 | 3513 | 2682 | |
| Oemokch’ŏng-ni | city | Korea, Dem. Peoples Rep. of (North) | 41.32 | 127.78 | 3513 | 2682 | |
| Oesang-ni | city | Korea, Dem. Peoples Rep. of (North) | 38.73 | 125.82 | 101 | 25965 | |
| Oeso-ri | city | Korea, Dem. Peoples Rep. of (North) | 39.68 | 125.87 | 262 | 27369 | |
| Oesong-dong | city | Korea, Dem. Peoples Rep. of (North) | 39.02 | 125.75 | 9 | 559906 | |
| Ogang-dong | city | Korea, Dem. Peoples Rep. of (North) | 38.50 | 125.75 | 127 | 278995 | |
| Ogang-ni | city | Korea, Dem. Peoples Rep. of (North) | 38.50 | 125.75 | 127 | 278995 | |
| Ogung-dong | city | Korea, Dem. Peoples Rep. of (North) | 40.07 | 124.93 | 830 | 4470 | |
| Ogŭm-dong | city | Korea, Dem. Peoples Rep. of (North) | 37.92 | 125.40 | 75 | 17168 | |
| Oha-dong | city | Korea, Dem. Peoples Rep. of (North) | 39.55 | 125.95 | 403 | 42548 | |
| Ohwa-ri | city | Korea, Dem. Peoples Rep. of (North) | 39.12 | 125.35 | 104 | 26120 | |
| Oi-ri | city | Korea, Dem. Peoples Rep. of (North) | 38.97 | 125.38 | 95 | 54117 | |
| Ojoksan-ni | city | Korea, Dem. Peoples Rep. of (North) | 38.20 | 126.97 | 347 | 9897 | |
| Ok-tong | city | Korea, Dem. Peoples Rep. of (North) | 39.67 | 125.40 | 68 | 27425 | |
| Okch'on-ni | city | Korea, Dem. Peoples Rep. of (North) | 38.05 | 125.32 | 42 | 19884 | |
| Okch'onam | city | Korea, Dem. Peoples Rep. of (North) | 38.60 | 128.07 | 2011 | 11473 | |
| Okch’ŏn-ni | city | Korea, Dem. Peoples Rep. of (North) | 38.05 | 125.32 | 42 | 19884 | |
| Okch’ŏnam | city | Korea, Dem. Peoples Rep. of (North) | 38.60 | 128.07 | 2011 | 11473 | |
| Om-dong | city | Korea, Dem. Peoples Rep. of (North) | 40.13 | 125.82 | 830 | 18215 | |
| Omgyo-dong | city | Korea, Dem. Peoples Rep. of (North) | 39.83 | 125.32 | 830 | 15267 | |
| Omnyang-dong | city | Korea, Dem. Peoples Rep. of (North) | 38.30 | 125.10 | 180 | 22409 | |
| Omsu-dong | city | Korea, Dem. Peoples Rep. of (North) | 39.82 | 124.80 | 32 | 20721 | |
| Omsu-gol | city | Korea, Dem. Peoples Rep. of (North) | 39.82 | 124.80 | 32 | 20721 | |
| Omyonp'o | city | Korea, Dem. Peoples Rep. of (North) | 41.27 | 127.62 | 2509 | 2682 | |
| On-dong | city | Korea, Dem. Peoples Rep. of (North) | 37.77 | 125.90 | 0 | 564 | |
| On-dong | city | Korea, Dem. Peoples Rep. of (North) | 38.28 | 125.62 | 167 | 32755 | |
| Onch'ae-ri | city | Korea, Dem. Peoples Rep. of (North) | 38.43 | 125.72 | 13 | 27202 | |
| Onchū-dō | city | Korea, Dem. Peoples Rep. of (North) | 40.32 | 125.07 | 1020 | 18459 | |
| Onch’ae-ri | city | Korea, Dem. Peoples Rep. of (North) | 38.43 | 125.72 | 13 | 27202 | |
| Ongam | city | Korea, Dem. Peoples Rep. of (North) | 38.25 | 125.20 | 137 | 21480 | |
| Onggijom | city | Korea, Dem. Peoples Rep. of (North) | 38.90 | 125.87 | 108 | 10132 | |
| Onjung-dong | city | Korea, Dem. Peoples Rep. of (North) | 40.32 | 125.07 | 1020 | 18459 | |
| Onsa-ri | city | Korea, Dem. Peoples Rep. of (North) | 40.18 | 126.43 | 1154 | 3580 | |
| Onyang | city | Korea, Dem. Peoples Rep. of (North) | 37.77 | 125.62 | 0 | 4759 | |
| Oo-dong | city | Korea, Dem. Peoples Rep. of (North) | 39.07 | 125.48 | 55 | 24868 | |
| Op'o-ri | city | Korea, Dem. Peoples Rep. of (North) | 38.18 | 126.27 | 104 | 17420 | |
| Op'yong | city | Korea, Dem. Peoples Rep. of (North) | 37.95 | 125.70 | 0 | 7460 | |
| Op’o-ri | city | Korea, Dem. Peoples Rep. of (North) | 38.18 | 126.27 | 104 | 17420 | |
| Op’yŏng | city | Korea, Dem. Peoples Rep. of (North) | 37.95 | 125.70 | 0 | 7460 | |
| Ot'an-dong | city | Korea, Dem. Peoples Rep. of (North) | 39.00 | 125.75 | 29 | 559743 | |
| Ot'an-ni | city | Korea, Dem. Peoples Rep. of (North) | 38.15 | 126.93 | 272 | 11358 | |
| Ot’an-dong | city | Korea, Dem. Peoples Rep. of (North) | 39.00 | 125.75 | 29 | 559743 | |
| Ot’an-ni | city | Korea, Dem. Peoples Rep. of (North) | 38.15 | 126.93 | 272 | 11358 | |
| Oui-dong | city | Korea, Dem. Peoples Rep. of (North) | 39.68 | 125.51 | 9 | 26523 | |
| Oyang-dong | city | Korea, Dem. Peoples Rep. of (North) | 38.68 | 125.65 | 39 | 43162 |