| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sei | city | Gyeongnam | Korea, Republic of (South) | 34.92 | 128.07 | 0 | 31884 |
| Sei-ri | city | Gyeongnam | Korea, Republic of (South) | 34.92 | 128.07 | 0 | 31884 |
| Seibō-ri | city | Jeonnam | Korea, Republic of (South) | 34.37 | 126.14 | 3 | 3960 |
| Seidō | city | Gyeongbuk | Korea, Republic of (South) | 35.65 | 128.74 | 396 | 7748 |
| Seifu | city | Chungbuk | Korea, Republic of (South) | 37.00 | 128.17 | 830 | 9834 |
| Seifuku | city | Gyeongbuk | Korea, Republic of (South) | 36.63 | 128.47 | 357 | 21514 |
| Seifuku-do | city | Gyeongbuk | Korea, Republic of (South) | 36.63 | 128.47 | 357 | 21514 |
| Seihei | city | Gangwon | Korea, Republic of (South) | 37.15 | 129.20 | 830 | 0 |
| Seiheisen | city | Gyeonggi | Korea, Republic of (South) | 37.74 | 127.42 | 157 | 66 |
| Seiho | city | Incheon | Korea, Republic of (South) | 37.70 | 126.37 | 118 | 4670 |
| Seiho | city | Jeonnam | Korea, Republic of (South) | 34.69 | 127.17 | 0 | 2839 |
| Seihyō | city | Gangwon | Korea, Republic of (South) | 37.15 | 129.20 | 830 | 0 |
| Seiin | city | Jeonbuk | Korea, Republic of (South) | 35.77 | 127.22 | 879 | 151722 |
| Seijō-ri | city | Jeonnam | Korea, Republic of (South) | 34.58 | 126.30 | 0 | 6071 |
| Seika | city | Gyeongbuk | Korea, Republic of (South) | 36.20 | 129.37 | 16 | 66854 |
| Seikan-ri | city | Chungnam | Korea, Republic of (South) | 36.92 | 127.13 | 59 | 63252 |
| Seikei-ri | city | Jeonnam | Korea, Republic of (South) | 34.17 | 126.89 | 357 | 2562 |
| Seiki-ri | city | Jeju | Korea, Republic of (South) | 33.25 | 126.56 | 111 | 18002 |
| Seikiho | city | Jeju | Korea, Republic of (South) | 33.25 | 126.56 | 111 | 18002 |
| Seiko Koku | city | Korea, Republic of (South) | 34.85 | 128.57 | 0 | 35690 | |
| Seiko-ri | city | Jeonbuk | Korea, Republic of (South) | 35.73 | 126.66 | 16 | 12249 |
| Seiko-ri | city | Jeonnam | Korea, Republic of (South) | 34.45 | 126.47 | 82 | 3928 |
| Seikyojito-ri | city | Jeonnam | Korea, Republic of (South) | 34.26 | 125.92 | 0 | 485 |
| Seikyū-ri | city | Gangwon | Korea, Republic of (South) | 38.00 | 128.11 | 1246 | 2192 |
| Seikō-ri | city | Jeonnam | Korea, Republic of (South) | 34.37 | 126.61 | 29 | 12098 |
| Seimei-ri | city | Gyeongbuk | Korea, Republic of (South) | 36.80 | 129.44 | 203 | 4755 |
| Seiryu | city | Chungbuk | Korea, Republic of (South) | 36.62 | 127.32 | 65 | 94940 |
| Seiryu | city | Chungnam | Korea, Republic of (South) | 36.53 | 127.25 | 232 | 15687 |
| Seiryō-dō | city | Gyeongbuk | Korea, Republic of (South) | 36.45 | 128.35 | 190 | 6696 |
| Seiryū-ri | city | Jeonnam | Korea, Republic of (South) | 34.44 | 126.30 | 193 | 9078 |
| Seiryū-ri | city | Jeonnam | Korea, Republic of (South) | 34.41 | 126.80 | 72 | 4381 |
| Seisan-ri | city | Gyeongnam | Korea, Republic of (South) | 34.63 | 128.23 | 59 | 3198 |
| Seisan-ri | city | Gyeongnam | Korea, Republic of (South) | 35.10 | 128.07 | 19 | 73820 |
| Seisan-ri | city | Jeonnam | Korea, Republic of (South) | 34.65 | 126.33 | 410 | 6213 |
| Seisei-ri | city | Ulsan | Korea, Republic of (South) | 35.38 | 129.34 | 3 | 32125 |
| Seisei-ri | city | Gyeonggi | Korea, Republic of (South) | 37.06 | 127.06 | 101 | 170973 |
| Seishin | city | Gyeongbuk | Korea, Republic of (South) | 36.18 | 129.40 | 0 | 40369 |
| Seishin-ri | city | Jeonnam | Korea, Republic of (South) | 34.64 | 126.66 | 830 | 10835 |
| Seishin-ri | city | Jeonnam | Korea, Republic of (South) | 34.55 | 126.66 | 95 | 18820 |
| Seishin-ri | city | Gyeongbuk | Korea, Republic of (South) | 36.18 | 129.40 | 0 | 40369 |
| Seishisenjŏ-ri | city | Gangwon | Korea, Republic of (South) | 37.84 | 127.56 | 347 | 1785 |
| Seisho | city | Gyeongbuk | Korea, Republic of (South) | 36.46 | 128.90 | 830 | 3427 |
| Seisho | city | Gyeongbuk | Korea, Republic of (South) | 36.43 | 129.06 | 830 | 4172 |
| Seishu | city | Gyeongbuk | Korea, Republic of (South) | 35.92 | 128.29 | 124 | 8344 |
| Seishō-gun | city | Gyeongbuk | Korea, Republic of (South) | 36.43 | 129.06 | 830 | 4172 |
| Seison-ri | city | Jeonnam | Korea, Republic of (South) | 34.69 | 127.58 | 32 | 38806 |
| Seitei-ri | city | Jeonnam | Korea, Republic of (South) | 34.39 | 126.56 | 108 | 7985 |
| Seito-ri | city | Korea, Republic of (South) | 35.70 | 126.57 | 0 | 5813 | |
| Seitoshin-ri | city | Gangwon | Korea, Republic of (South) | 37.68 | 129.03 | 252 | 15777 |
| Seiu | city | Jeonbuk | Korea, Republic of (South) | 35.57 | 126.86 | 118 | 112082 |
| Seiyo | city | Chungnam | Korea, Republic of (South) | 36.45 | 126.80 | 830 | 7977 |
| Seiyu | city | Jeonbuk | Korea, Republic of (South) | 35.57 | 126.86 | 118 | 112082 |
| Seizan | city | Chungbuk | Korea, Republic of (South) | 36.35 | 127.79 | 354 | 8134 |
| Seizan-ri | city | Gyeongnam | Korea, Republic of (South) | 34.63 | 128.23 | 59 | 3198 |
| Seizan-ri | city | Jeonnam | Korea, Republic of (South) | 34.58 | 126.90 | 249 | 9605 |
| Seizan-ri | city | Jeonnam | Korea, Republic of (South) | 34.65 | 126.33 | 410 | 6213 |
| Seizen | city | Gangwon | Korea, Republic of (South) | 37.38 | 128.66 | 1010 | 2980 |