| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Sado | city | Yamagata-ken | Japan | 38.7902778 | 140.2186111 | 239 | 15785 |
| Sagae | city | Yamagata-ken | Japan | 38.3725 | 140.2725 | 324 | 15874 |
| Sakaida | city | Yamagata-ken | Japan | 38.7361111 | 140.6086111 | 1558 | 22710 |
| Sakamachi | city | Yamagata-ken | Japan | 37.95 | 139.9833333 | 967 | 15967 |
| Sakamachi | city | Yamagata-ken | Japan | 38.0725 | 139.9930556 | 839 | 15939 |
| Sakata | city | Yamagata-ken | Japan | 38.9166667 | 139.855 | 32 | 12022 |
| Sakemachi | city | Yamagata-ken | Japan | 37.95 | 139.9833333 | 967 | 15967 |
| Sanse | city | Yamagata-ken | Japan | 38.7 | 139.6666667 | 265 | 12129 |
| Sanze | city | Yamagata-ken | Japan | 38.7 | 139.6666667 | 265 | 12129 |
| Sasanomachi | city | Yamagata-ken | Japan | 37.8666667 | 140.1166667 | 1046 | 15985 |
| Sawauchi | city | Yamagata-ken | Japan | 38.6861111 | 140.1569444 | 469 | 15800 |
| Seki | city | Yamagata-ken | Japan | 38.55 | 139.55 | 318 | 10514 |
| Sekimachi | city | Yamagata-ken | Japan | 37.8333333 | 140.0833333 | 1791 | 16173 |
| Sekiya | city | Yamagata-ken | Japan | 38.6419444 | 140.4883333 | 715 | 15810 |
| Semi | city | Yamagata-ken | Japan | 38.7536111 | 140.4188889 | 1476 | 15785 |
| Shakado | city | Yamagata-ken | Japan | 38.2380556 | 140.3902778 | 1089 | 15902 |
| Shakadō | city | Yamagata-ken | Japan | 38.2380556 | 140.3902778 | 1089 | 15902 |
| Shigeoka | city | Yamagata-ken | Japan | 38.4666667 | 139.7666667 | 1026 | 16290 |
| Shimizu | city | Yamagata-ken | Japan | 38.7036111 | 140.2255556 | 213 | 15800 |
| Shimmachi | city | Yamagata-ken | Japan | 38.9166667 | 139.8333333 | 3 | 6220 |
| Shimmachi | city | Yamagata-ken | Japan | 38.8544444 | 140.2502778 | 311 | 15765 |
| Shimo-hongo | city | Yamagata-ken | Japan | 38.6 | 139.8333333 | 374 | 15818 |
| Shimo-hongō | city | Yamagata-ken | Japan | 38.6 | 139.8333333 | 374 | 15818 |
| Shimo-kawabe | city | Yamagata-ken | Japan | 37.9333333 | 140.1166667 | 856 | 15967 |
| Shimo-kawadai | city | Yamagata-ken | Japan | 38.7 | 139.95 | 564 | 15800 |
| Shimo-kawatai | city | Yamagata-ken | Japan | 38.7 | 139.95 | 564 | 15800 |
| Shimo-yachi | city | Yamagata-ken | Japan | 37.9166667 | 139.8833333 | 1312 | 15967 |
| Shimogumi | city | Yamagata-ken | Japan | 38.8166667 | 139.85 | 62 | 15718 |
| Shin-nozoki | city | Yamagata-ken | Japan | 38.9747222 | 140.3569444 | 1312 | 14983 |
| Shinden | city | Yamagata-ken | Japan | 38.4166667 | 140.45 | 688 | 15856 |
| Shindo | city | Yamagata-ken | Japan | 38.1711111 | 140.2927778 | 574 | 15911 |
| Shindō | city | Yamagata-ken | Japan | 38.1711111 | 140.2927778 | 574 | 15911 |
| Shinjo | city | Yamagata-ken | Japan | 38.7586111 | 140.3008333 | 328 | 15785 |
| Shinjō | city | Yamagata-ken | Japan | 38.7586111 | 140.3008333 | 328 | 15785 |
| Shinmachi | city | Yamagata-ken | Japan | 38.4 | 140.3833333 | 400 | 15866 |
| Shiokarada | city | Yamagata-ken | Japan | 38.2347222 | 140.2675 | 590 | 15902 |
| Shiraiwa | city | Yamagata-ken | Japan | 38.4 | 140.2333333 | 597 | 15866 |
| Shirasuka | city | Yamagata-ken | Japan | 38.6902778 | 140.235 | 200 | 15800 |
| Shirayamabayashi | city | Yamagata-ken | Japan | 38.7166667 | 139.7833333 | 147 | 14708 |
| Shirayamahayashi | city | Yamagata-ken | Japan | 38.7166667 | 139.7833333 | 147 | 14708 |
| Shirotori | city | Yamagata-ken | Japan | 38.5047222 | 140.3211111 | 452 | 15838 |
| Shitsu | city | Yamagata-ken | Japan | 38.4833333 | 140 | 1998 | 15846 |
| Shizu | city | Yamagata-ken | Japan | 38.4833333 | 140 | 1998 | 15846 |
| Shogan | city | Yamagata-ken | Japan | 38.6202778 | 140.4397222 | 433 | 15818 |
| Shōgan | city | Yamagata-ken | Japan | 38.6202778 | 140.4397222 | 433 | 15818 |
| Sindscho | city | Yamagata-ken | Japan | 38.7586111 | 140.3008333 | 328 | 15785 |
| Sinzyo | city | Yamagata-ken | Japan | 38.7586111 | 140.3008333 | 328 | 15785 |
| Soetsu | city | Yamagata-ken | Japan | 38.7666667 | 139.95 | 154 | 15785 |
| Soezu | city | Yamagata-ken | Japan | 38.7666667 | 139.95 | 154 | 15785 |
| Soigawa | city | Yamagata-ken | Japan | 38.0263889 | 140.077778 | 751 | 15947 |
| Suganodai | city | Yamagata-ken | Japan | 38.6166667 | 139.7166667 | 935 | 15818 |
| Sugiyama | city | Yamagata-ken | Japan | 38.2563889 | 140.1052778 | 1066 | 15894 |
| Sumizuta | city | Yamagata-ken | Japan | 38.8044444 | 140.1755556 | 337 | 15775 |
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