| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
| Si'an | city | Zhejiang Sheng | China | 30.8983333 | 119.6536111 | 3 | 50071 |
| Siangshan | city | Zhejiang Sheng | China | 29.4747222 | 121.8655556 | 82 | 53739 |
| Siangshanhsien | city | Zhejiang Sheng | China | 29.4747222 | 121.8655556 | 82 | 53739 |
| Siaofeng | city | Zhejiang Sheng | China | 30.5897222 | 119.5480556 | 98 | 30696 |
| Siaofenghsien | city | Zhejiang Sheng | China | 30.5897222 | 119.5480556 | 98 | 30696 |
| Siaoshan | city | Zhejiang Sheng | China | 30.1675 | 120.2588889 | 36 | 144192 |
| Siaoshanhsien | city | Zhejiang Sheng | China | 30.1675 | 120.2588889 | 36 | 144192 |
| Siashih | city | Zhejiang Sheng | China | 30.5272222 | 120.6886111 | 26 | 116104 |
| Sibaitian | city | Zhejiang Sheng | China | 28.6747222 | 119.5197222 | 1200 | 28195 |
| Sibian | city | Zhejiang Sheng | China | 28.2402778 | 121.3777778 | 36 | 75733 |
| Sichalu | city | Zhejiang Sheng | China | 28.8297222 | 121.5919444 | 3 | 56734 |
| Sichow | city | Zhejiang Sheng | China | 29.4788889 | 121.6727778 | 72 | 49821 |
| Sicun | city | Zhejiang Sheng | China | 27.9186111 | 120.8441667 | 3 | 137075 |
| Sidu | city | Zhejiang Sheng | China | 28.8427778 | 118.6913889 | 275 | 35793 |
| Sidu | city | Zhejiang Sheng | China | 28.215 | 120.955 | 127 | 102110 |
| Sienku | city | Zhejiang Sheng | China | 28.85 | 120.7333333 | 95 | 27739 |
| Sienkuhsien | city | Zhejiang Sheng | China | 28.85 | 120.7333333 | 95 | 27739 |
| Sienkü | city | Zhejiang Sheng | China | 28.85 | 120.7333333 | 95 | 27739 |
| Sifentou | city | Zhejiang Sheng | China | 30.0833333 | 122.04 | 328 | 66330 |
| Sihou | city | Zhejiang Sheng | China | 28.9902778 | 119.1833333 | 124 | 47053 |
| Sihou | city | Zhejiang Sheng | China | 28.94 | 119.7791667 | 209 | 28867 |
| Sijia | city | Zhejiang Sheng | China | 27.8711111 | 120.7944444 | 19 | 57453 |
| Sijia | city | Zhejiang Sheng | China | 28.5586111 | 121.4286111 | 3 | 86488 |
| Sijiaoliangting | city | Zhejiang Sheng | China | 30.7141667 | 122.46 | 196 | 36256 |
| Sikantou | city | Zhejiang Sheng | China | 29.3844444 | 119.0991667 | 442 | 24641 |
| Silin | city | Zhejiang Sheng | China | 28.8677778 | 121.6044444 | 3 | 45683 |
| Siling | city | Zhejiang Sheng | China | 30.4241667 | 119.7736111 | 180 | 79219 |
| Silintang | city | Zhejiang Sheng | China | 28.8577778 | 121.615 | 3 | 45683 |
| Silu | city | Zhejiang Sheng | China | 29.0508333 | 120.2247222 | 347 | 55896 |
| Silukou | city | Zhejiang Sheng | China | 29.0508333 | 120.2247222 | 347 | 55896 |
| Simen | city | Zhejiang Sheng | China | 30.1616667 | 121.0388889 | 29 | 99884 |
| Simingshan | city | Zhejiang Sheng | China | 29.7291667 | 121.1141667 | 2250 | 73031 |
| Sin-cheng-hsien | city | Zhejiang Sheng | China | 29.9752778 | 119.7266667 | 26 | 41640 |
| Sinchang | city | Zhejiang Sheng | China | 29.4886111 | 120.9075 | 226 | 48040 |
| Sinchanghsien | city | Zhejiang Sheng | China | 29.4886111 | 120.9075 | 226 | 48040 |
| Sincheng Che | city | Zhejiang Sheng | China | 29.9752778 | 119.7266667 | 26 | 41640 |
| Sinkeamun | city | Zhejiang Sheng | China | 29.9497222 | 122.2836111 | 13 | 41160 |
| Sinshih | city | Zhejiang Sheng | China | 30.6188889 | 120.2816667 | 29 | 68671 |
| Sinteng | city | Zhejiang Sheng | China | 29.9752778 | 119.7266667 | 26 | 41640 |
| Sintenghsien | city | Zhejiang Sheng | China | 29.9752778 | 119.7266667 | 26 | 41640 |
| Siping | city | Zhejiang Sheng | China | 30.4394444 | 122.3855556 | 183 | 33877 |
| Siqian | city | Zhejiang Sheng | China | 27.6705556 | 119.7813889 | 948 | 24316 |
| Siqian | city | Zhejiang Sheng | China | 29.6 | 119.9166667 | 1400 | 52172 |
| Siqian | city | Zhejiang Sheng | China | 27.9780556 | 120.7147222 | 32 | 234000 |
| Siqian | city | Zhejiang Sheng | China | 28.1630556 | 120.7147222 | 82 | 38192 |
| Siqian | city | Zhejiang Sheng | China | 28.7477778 | 120.8575 | 531 | 29059 |
| Siqian | city | Zhejiang Sheng | China | 29.9933333 | 122.0344444 | 0 | 21977 |
| Siqianjie | city | Zhejiang Sheng | China | 27.92 | 120.8211111 | 29 | 198403 |
| Sisha | city | Zhejiang Sheng | China | 27.6 | 120.6366667 | 0 | 43429 |
| Siukowchen | city | Zhejiang Sheng | China | 28.4666667 | 118.5333333 | 688 | 36425 |
| Sixi | city | Zhejiang Sheng | China | 27.4705556 | 120.044444 | 1811 | 27631 |
| Sixiazhang | city | Zhejiang Sheng | China | 29.5925 | 120.1836111 | 223 | 57732 |
| Sizhai | city | Zhejiang Sheng | China | 29.5730556 | 120.4316667 | 482 | 57573 |
| Sizhou | city | Zhejiang Sheng | China | 29.9797222 | 120.2891667 | 78 | 138135 |
| Sizhoutou | city | Zhejiang Sheng | China | 29.55 | 121.75 | 3 | 26065 |
| Sizhoutouzhen | city | Zhejiang Sheng | China | 29.3727778 | 121.7675 | 3 | 48267 |
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