| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Ong-ch'on | city | Gyeonggi | Korea, Republic of (South) | 36.99 | 127.15 | 32 | 69965 |
| Ong-ch’on | city | Gyeonggi | Korea, Republic of (South) | 36.99 | 127.15 | 32 | 69965 |
| Ong-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.60 | 128.37 | 347 | 7204 |
| Ong-dong | city | Korea, Republic of (South) | 35.53 | 126.90 | 357 | 46394 | |
| Ong-gol | city | Gangwon | Korea, Republic of (South) | 37.21 | 127.87 | 994 | 16522 |
| Ong-gol | city | Gyeongnam | Korea, Republic of (South) | 35.15 | 128.38 | 830 | 38300 |
| Ong-ni | city | Jeonnam | Korea, Republic of (South) | 34.90 | 127.07 | 987 | 7890 |
| Ong-ni | city | Jeonnam | Korea, Republic of (South) | 35.16 | 127.08 | 830 | 8859 |
| Ongam | city | Jeonnam | Korea, Republic of (South) | 34.53 | 126.55 | 9 | 13356 |
| Ongam | city | Jeonnam | Korea, Republic of (South) | 34.44 | 126.88 | 0 | 5252 |
| Ongam | city | Jeonnam | Korea, Republic of (South) | 34.79 | 127.39 | 3 | 11163 |
| Ongam | city | Incheon | Korea, Republic of (South) | 37.54 | 126.38 | 0 | 2226 |
| Ongam-ni | city | Incheon | Korea, Republic of (South) | 37.53 | 126.37 | 3 | 2139 |
| Ongam-ni | city | Korea, Republic of (South) | 34.78 | 127.38 | 3 | 8830 | |
| Ongam-ni | city | Jeonnam | Korea, Republic of (South) | 34.79 | 127.38 | 0 | 13334 |
| Ongam-ni | city | Jeonnam | Korea, Republic of (South) | 34.53 | 126.55 | 9 | 13356 |
| Ongam-ni | city | Jeonnam | Korea, Republic of (South) | 34.44 | 126.88 | 0 | 5252 |
| Ongam-ni | city | Chungnam | Korea, Republic of (South) | 36.48 | 126.63 | 406 | 15489 |
| Ongch'on | city | Gyeongbuk | Korea, Republic of (South) | 36.69 | 128.70 | 830 | 7944 |
| Ongch'on-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.68 | 128.70 | 830 | 7487 |
| Ongch'on-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.69 | 128.70 | 830 | 7944 |
| Ongcheon | city | Gyeonggi | Korea, Republic of (South) | 36.99 | 127.15 | 32 | 69965 |
| Ongchon-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.72 | 128.70 | 1056 | 11924 |
| Ongch’ŏn | city | Gyeongbuk | Korea, Republic of (South) | 36.69 | 128.70 | 830 | 7944 |
| Ongch’ŏn-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.68 | 128.70 | 830 | 7487 |
| Ongch’ŏn-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.69 | 128.70 | 830 | 7944 |
| Ongdaengi | city | Chungbuk | Korea, Republic of (South) | 37.17 | 128.17 | 964 | 39858 |
| Ongdol | city | Gangwon | Korea, Republic of (South) | 37.79 | 128.03 | 1669 | 2533 |
| Onggidongmak | city | Gyeongbuk | Korea, Republic of (South) | 36.52 | 129.04 | 830 | 3844 |
| Onggigol | city | Gyeongnam | Korea, Republic of (South) | 35.29 | 129.02 | 830 | 193089 |
| Onggijeom | city | Chungnam | Korea, Republic of (South) | 36.21 | 127.18 | 42 | 22087 |
| Onggijeommal | city | Gangwon | Korea, Republic of (South) | 37.96 | 127.77 | 390 | 53715 |
| Onggijom | city | Gyeongbuk | Korea, Republic of (South) | 37.01 | 129.38 | 29 | 5646 |
| Onggijom | city | Gyeongbuk | Korea, Republic of (South) | 36.89 | 129.37 | 410 | 6361 |
| Onggijom | city | Gyeongnam | Korea, Republic of (South) | 35.37 | 128.28 | 380 | 7450 |
| Onggijŏm | city | Gangwon | Korea, Republic of (South) | 37.47 | 129.13 | 118 | 34477 |
| Onggijŏm-mal | city | Gangwon | Korea, Republic of (South) | 37.96 | 127.77 | 390 | 53715 |
| Onggijŏmmal | city | Gangwon | Korea, Republic of (South) | 38.11 | 127.69 | 364 | 2533 |
| Onggijŏmmal | city | Gangwon | Korea, Republic of (South) | 38.05 | 127.65 | 830 | 3132 |
| Onggijŏn-mal | city | Gangwon | Korea, Republic of (South) | 37.35 | 128.38 | 1007 | 997 |
| Onggima | city | Gyeongbuk | Korea, Republic of (South) | 36.59 | 128.65 | 830 | 34566 |
| Onggima | city | Gyeongbuk | Korea, Republic of (South) | 36.44 | 129.07 | 984 | 4172 |
| Onggol | city | Gangwon | Korea, Republic of (South) | 38.19 | 128.56 | 347 | 22967 |
| Onggudongmak | city | Gyeongbuk | Korea, Republic of (South) | 36.73 | 129.38 | 206 | 6705 |
| Onggujom | city | Gangwon | Korea, Republic of (South) | 37.48 | 129.08 | 236 | 44488 |
| Ongguma | city | Gyeongbuk | Korea, Republic of (South) | 36.59 | 128.65 | 830 | 34566 |
| Ongil | city | Incheon | Korea, Republic of (South) | 37.66 | 126.42 | 45 | 6422 |
| Ongimi | city | Chungbuk | Korea, Republic of (South) | 37.08 | 127.94 | 314 | 24554 |
| Ongjakgol | city | Incheon | Korea, Republic of (South) | 37.69 | 126.45 | 324 | 9064 |
| Ongjang-gol | city | Gangwon | Korea, Republic of (South) | 37.50 | 128.24 | 1843 | 228 |
| Ongjang-gol | city | Gangwon | Korea, Republic of (South) | 37.64 | 128.57 | 1876 | 1058 |
| Ongjeong | city | Gyeonggi | Korea, Republic of (South) | 37.04 | 127.02 | 52 | 100594 |
| Ongjeongni | city | Gangwon | Korea, Republic of (South) | 37.22 | 128.35 | 938 | 15124 |
| Ongjom | city | Gyeongbuk | Korea, Republic of (South) | 36.47 | 129.07 | 925 | 4149 |
| Ongjom-ni | city | Jeonnam | Korea, Republic of (South) | 34.70 | 126.57 | 9 | 11970 |
| Ongjom-ni | city | Jeonnam | Korea, Republic of (South) | 34.82 | 126.68 | 9 | 13459 |
| Ongjong | city | Incheon | Korea, Republic of (South) | 37.63 | 126.68 | 39 | 178129 |
| Ongjong-ni | city | Gangwon | Korea, Republic of (South) | 37.22 | 128.35 | 938 | 15124 |
| Ongju-gol | city | Gyeongbuk | Korea, Republic of (South) | 36.67 | 129.39 | 830 | 4692 |
| Ongjŏm-dong | city | Gyeongbuk | Korea, Republic of (South) | 36.47 | 129.07 | 925 | 4149 |
| Ongjŏm-dong | city | Gangwon | Korea, Republic of (South) | 37.16 | 129.24 | 830 | 0 |
| Ongjŏm-ni | city | Gyeongbuk | Korea, Republic of (South) | 36.48 | 129.07 | 954 | 4091 |
| Ongjŏng | city | Gyeonggi | Korea, Republic of (South) | 37.04 | 127.02 | 52 | 100594 |
| Ongjŏng-ni | city | Chungnam | Korea, Republic of (South) | 36.90 | 126.81 | 19 | 8136 |
| Ongjŏng-ni | city | Jeonbuk | Korea, Republic of (South) | 35.36 | 127.30 | 190 | 7718 |
| Ongma-ri | city | Jeonnam | Korea, Republic of (South) | 34.80 | 127.04 | 830 | 7544 |
| Ongmae | city | Daejeon | Korea, Republic of (South) | 36.31 | 127.41 | 830 | 278816 |
| Ongmae-ri | city | Gyeongnam | Korea, Republic of (South) | 35.51 | 127.77 | 830 | 6705 |
| Ongmani | city | Gyeonggi | Korea, Republic of (South) | 37.26 | 127.37 | 830 | 61623 |
| Ongmoe | city | Daejeon | Korea, Republic of (South) | 36.31 | 127.41 | 830 | 278816 |
| Ongmyong | city | Korea, Republic of (South) | 34.87 | 128.73 | 0 | 32126 | |
| Ongmyonggol | city | Korea, Republic of (South) | 34.87 | 128.73 | 0 | 32126 | |
| Ongmyŏng-ni | city | Korea, Republic of (South) | 34.87 | 128.73 | 0 | 32126 | |
| Ongnam-dong | city | Chungnam | Korea, Republic of (South) | 36.03 | 126.67 | 19 | 36412 |
| Ongnam-ni | city | Chungnam | Korea, Republic of (South) | 36.03 | 126.67 | 19 | 36412 |
| Ongnim | city | Jeonnam | Korea, Republic of (South) | 35.01 | 127.02 | 360 | 13229 |
| Ongnudong | city | Gangwon | Korea, Republic of (South) | 37.70 | 128.20 | 1669 | 2533 |
| Ongnuk-ch'on | city | Chungbuk | Korea, Republic of (South) | 36.16 | 127.95 | 984 | 4334 |
| Ongnyeobong | city | Gyeonggi | Korea, Republic of (South) | 37.41 | 127.68 | 308 | 9681 |
| Ongnyeobong | city | Chungnam | Korea, Republic of (South) | 36.29 | 127.53 | 830 | 88866 |
| Ongnyobong | city | Gyeonggi | Korea, Republic of (South) | 37.41 | 127.68 | 308 | 9681 |
| Ongnyol-li | city | Gyeongbuk | Korea, Republic of (South) | 35.91 | 128.22 | 830 | 8344 |
| Ongnyong | city | Jeonnam | Korea, Republic of (South) | 34.44 | 127.13 | 3 | 4764 |
| Ongnyong-dong | city | Gyeongnam | Korea, Republic of (South) | 35.57 | 128.45 | 82 | 13243 |
| Ongnyong-ni | city | Jeonnam | Korea, Republic of (South) | 34.44 | 127.13 | 3 | 4764 |
| Ongnyongdong | city | Chungnam | Korea, Republic of (South) | 36.45 | 127.14 | 367 | 69811 |
| Ongnyu-ri | city | Gyeongbuk | Korea, Republic of (South) | 36.48 | 129.29 | 1115 | 0 |
| Ongnyul-tong | city | Gyeongbuk | Korea, Republic of (South) | 36.17 | 128.10 | 830 | 40705 |
| Ongnyŏ-bong | city | Jeonnam | Korea, Republic of (South) | 34.51 | 126.93 | 6 | 8183 |
| Ongnyŏam | city | Gyeongbuk | Korea, Republic of (South) | 36.32 | 129.27 | 830 | 5814 |
| Ongnyŏn | city | Jeonnam | Korea, Republic of (South) | 34.82 | 127.01 | 830 | 8390 |
| Ongnŭk-ch’on | city | Chungbuk | Korea, Republic of (South) | 36.16 | 127.95 | 984 | 4334 |
| Ongok | city | Ulsan | Korea, Republic of (South) | 35.34 | 129.29 | 141 | 9714 |
| Ongon-dong | city | Gyeongbuk | Korea, Republic of (South) | 37.02 | 129.41 | 157 | 4072 |
| Ongp'o | city | Korea, Republic of (South) | 34.73 | 127.25 | 0 | 4933 | |
| Ongp'o | city | Gyeonggi | Korea, Republic of (South) | 37.04 | 126.92 | 29 | 7972 |
| Ongpo | city | Gyeonggi | Korea, Republic of (South) | 37.04 | 126.92 | 29 | 7972 |
| Ongp’o | city | Korea, Republic of (South) | 34.73 | 127.25 | 0 | 4933 | |
| Ongp’o | city | Gyeonggi | Korea, Republic of (South) | 37.04 | 126.92 | 29 | 7972 |
| Ongsaengi-gol | city | Chungnam | Korea, Republic of (South) | 36.87 | 126.78 | 3 | 13789 |