| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sia | city | Dosso | Niger | 12.11 | 3.29 | 830 | 8092 |
| Siankolé | city | Tillaberi | Niger | 12.87 | 1.88 | 830 | 2180 |
| Siankoré Bambara | city | Tillaberi | Niger | 12.87 | 1.88 | 830 | 2180 |
| Sidaouet | city | Agadez | Niger | 18.52 | 8.09 | 1998 | 0 |
| Sidaré | city | Niger | 13.63 | 2.93 | 830 | 3154 | |
| Sidawet | city | Agadez | Niger | 18.52 | 8.09 | 1998 | 0 |
| Sidi Kouara | city | Tillaberi | Niger | 13.02 | 2.30 | 830 | 1460 |
| Sidi Kouara | city | Dosso | Niger | 12.50 | 2.88 | 830 | 4120 |
| Sidi Kwara | city | Dosso | Niger | 13.22 | 3.65 | 830 | 4917 |
| Sidi Kwara | city | Tillaberi | Niger | 13.02 | 2.30 | 830 | 1460 |
| Sidi Kwara | city | Dosso | Niger | 12.50 | 2.88 | 830 | 4120 |
| Sidi Sidi | city | Zinder | Niger | 13.80 | 8.83 | 1669 | 894 |
| Sidi-Koara | city | Dosso | Niger | 13.22 | 3.65 | 830 | 4917 |
| Sidobia | city | Niger | 13.82 | 1.58 | 830 | 7607 | |
| Sidwalès | city | Agadez | Niger | 16.74 | 6.79 | 1669 | 0 |
| Sidéré | city | Niger | 13.63 | 2.93 | 830 | 3154 | |
| Sigaradou | city | Tillaberi | Niger | 13.92 | 3.18 | 830 | 3530 |
| Sikiey | city | Tillaberi | Niger | 13.64 | 1.83 | 830 | 4508 |
| Siksi | city | Agadez | Niger | 16.11 | 7.67 | 1669 | 0 |
| Sikye | city | Tillaberi | Niger | 13.64 | 1.83 | 830 | 4508 |
| Sila | city | Dosso | Niger | 13.12 | 2.90 | 830 | 42235 |
| Silenké Bangou | city | Tillaberi | Niger | 13.20 | 1.65 | 830 | 1788 |
| Sileyri | city | Zinder | Niger | 13.44 | 10.08 | 1223 | 1788 |
| Silfaye | city | Dosso | Niger | 13.07 | 3.70 | 830 | 7982 |
| Silia | city | Dosso | Niger | 13.12 | 2.90 | 830 | 42235 |
| Sill Boli | city | Tillaberi | Niger | 13.83 | 1.61 | 830 | 6358 |
| Simeri | city | Tillaberi | Niger | 14.14 | 2.13 | 892 | 3874 |
| Siminti | city | Tillaberi | Niger | 13.86 | 1.93 | 830 | 4315 |
| Siminti Kaina | city | Tillaberi | Niger | 13.86 | 1.94 | 830 | 4371 |
| Simiri | city | Tillaberi | Niger | 14.14 | 2.13 | 892 | 3874 |
| Simiti Keyna | city | Tillaberi | Niger | 13.86 | 1.94 | 830 | 4371 |
| Simiti-Kaina | city | Tillaberi | Niger | 13.86 | 1.94 | 830 | 4371 |
| Sin Gerawa | city | Maradi | Niger | 13.60 | 6.48 | 1026 | 10868 |
| Sin Guerawa | city | Maradi | Niger | 13.60 | 6.48 | 1026 | 10868 |
| Sina Dey | city | Dosso | Niger | 12.84 | 3.32 | 830 | 4917 |
| Sina Kouara | city | Tillaberi | Niger | 13.28 | 2.68 | 830 | 3844 |
| Sina Kwara | city | Dosso | Niger | 13.34 | 3.87 | 830 | 8630 |
| Sina-Dèye | city | Dosso | Niger | 12.84 | 3.32 | 830 | 4917 |
| Sina-Koara | city | Dosso | Niger | 13.34 | 3.87 | 830 | 8630 |
| Sindamoa | city | Tillaberi | Niger | 12.74 | 1.95 | 830 | 1974 |
| Sinder | city | Zinder | Niger | 13.80 | 8.99 | 1669 | 205309 |
| Sinderme | city | Tillaberi | Niger | 14.23 | 1.34 | 830 | 7395 |
| Sindou Moa | city | Tillaberi | Niger | 12.74 | 1.95 | 830 | 1974 |
| Sindèr | city | Tillaberi | Niger | 14.24 | 1.33 | 830 | 7079 |
| Sine Gorou | city | Niger | 13.35 | 1.05 | 830 | 1788 | |
| Sine Kwara | city | Tillaberi | Niger | 13.28 | 2.68 | 830 | 3844 |
| Sinedey | city | Dosso | Niger | 13.61 | 3.77 | 830 | 3204 |
| Sinedeye | city | Dosso | Niger | 13.61 | 3.77 | 830 | 3204 |
| Singill | city | Tillaberi | Niger | 14.71 | 2.18 | 830 | 1341 |
| Singka Koira | city | Tillaberi | Niger | 14.97 | 1.93 | 935 | 1341 |
| Singuibossey | city | Dosso | Niger | 12.82 | 3.28 | 830 | 4917 |
| Sini Bangou | city | Tillaberi | Niger | 13.92 | 1.96 | 830 | 3925 |
| Sini Bangou | city | Tillaberi | Niger | 14.04 | 2.00 | 830 | 3874 |
| Sinia | city | Tillaberi | Niger | 13.22 | 1.91 | 830 | 1403 |
| Sinibangou | city | Tillaberi | Niger | 14.02 | 1.99 | 830 | 3874 |
| Siniguinede | city | Dosso | Niger | 13.38 | 3.41 | 830 | 4917 |
| Sinisika | city | Tillaberi | Niger | 13.90 | 0.89 | 830 | 954 |
| Sinka | city | Tillaberi | Niger | 13.83 | 1.65 | 830 | 5386 |
| Sinnguibossey | city | Dosso | Niger | 12.82 | 3.28 | 830 | 4917 |
| Sinnguibosseye | city | Dosso | Niger | 12.82 | 3.28 | 830 | 4917 |
| Sinnsan Kaoura | city | Tillaberi | Niger | 13.91 | 2.26 | 830 | 3801 |
| Sinnsan Kwara Tégui | city | Dosso | Niger | 13.52 | 3.11 | 830 | 9470 |
| Sinnsan Kwara Zeno | city | Dosso | Niger | 13.54 | 3.11 | 830 | 9763 |
| Sinnsan Samari | city | Tillaberi | Niger | 13.91 | 2.29 | 830 | 3849 |
| Sinnsan-Koaratégui | city | Dosso | Niger | 13.52 | 3.11 | 830 | 9470 |
| Sinnsan-Koarazéno | city | Dosso | Niger | 13.54 | 3.11 | 830 | 9763 |
| Sino Kwara | city | Dosso | Niger | 13.73 | 3.30 | 830 | 5811 |
| Sino-Koara | city | Dosso | Niger | 13.73 | 3.30 | 830 | 5811 |
| Sinogoro | city | Tillaberi | Niger | 13.74 | 1.43 | 830 | 6854 |
| Sinoussi | city | Zinder | Niger | 14.06 | 9.88 | 1669 | 1351 |
| Sinsan | city | Tillaberi | Niger | 14.37 | 2.00 | 830 | 1626 |
| Sinsan Koarazeno | city | Dosso | Niger | 13.54 | 3.11 | 830 | 9763 |
| Sinsan Kouara | city | Tillaberi | Niger | 13.91 | 2.26 | 830 | 3801 |
| Sinsan Samari | city | Tillaberi | Niger | 13.91 | 2.29 | 830 | 3849 |
| Sinsan Tondi Kouara Tégui | city | Tillaberi | Niger | 13.92 | 2.16 | 859 | 3874 |
| Sinsan Tondi Koura Zéno | city | Tillaberi | Niger | 13.91 | 2.20 | 830 | 3874 |
| Siné-Koara | city | Tillaberi | Niger | 13.28 | 2.68 | 830 | 3844 |
| Sinégourou | city | Niger | 13.35 | 1.05 | 830 | 1788 | |
| Sirakatou | city | Dosso | Niger | 12.86 | 2.86 | 830 | 4303 |
| Sirakatouné | city | Dosso | Niger | 12.86 | 2.86 | 830 | 4303 |
| Siram | city | Tillaberi | Niger | 14.40 | 1.00 | 830 | 3725 |
| Sirdawa | city | Maradi | Niger | 13.75 | 7.37 | 1669 | 8593 |
| Sirgourou | city | Tillaberi | Niger | 13.37 | 2.68 | 830 | 3328 |
| Siria | city | Tahoua | Niger | 14.34 | 5.42 | 1187 | 5066 |
| Sirimbana | city | Tillaberi | Niger | 13.10 | 1.80 | 830 | 1788 |
| Siriniere Zarma | city | Tillaberi | Niger | 13.34 | 2.31 | 830 | 10761 |
| Siriniéré | city | Tillaberi | Niger | 13.34 | 2.31 | 830 | 10761 |
| Sisan | city | Tillaberi | Niger | 12.84 | 2.24 | 830 | 1788 |
| Sisan Tondi | city | Tillaberi | Niger | 14.06 | 2.06 | 859 | 3874 |
| Sisi | city | Diffa | Niger | 13.77 | 10.83 | 1174 | 1080 |
| Sisi | city | Zinder | Niger | 13.09 | 9.04 | 1249 | 11069 |
| Sisintondi | city | Tillaberi | Niger | 13.92 | 2.16 | 859 | 3874 |
| Sissan | city | Tillaberi | Niger | 12.84 | 2.24 | 830 | 1788 |
| Sissan Tondi | city | Tillaberi | Niger | 14.06 | 2.06 | 859 | 3874 |
| Sisya | city | Zinder | Niger | 13.86 | 10.39 | 1187 | 596 |
| Sitawa | city | Zinder | Niger | 12.91 | 8.83 | 1669 | 13558 |
| Siwili | city | Tillaberi | Niger | 14.99 | 1.72 | 1003 | 1341 |