| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Fort Saint Charles | city | Minnesota | United States | 49.36 | -94.98 | 1066 | |
| Fort Saint David | city | Tamil Nadu | India | 11.74 | 79.79 | 3 | 57783 |
| Fort Saint James | city | British Columbia | Canada | 54.43 | -124.25 | 2509 | 2301 |
| Fort Saint John | city | British Columbia | Canada | 56.25 | -120.83 | 2509 | 15726 |
| Fort Saint Michael (historical) | city | Alaska | United States | 57.30 | -135.37 | 1197 | |
| Fort Saint Michel | city | No | Haiti | 19.72 | -72.20 | 26 | 131272 |
| Fort Saint Phillip (historical) | city | Louisiana | United States | 29.36 | -89.46 | 13 | |
| Fort Saint Pierre | city | Martinique | Martinique | 14.74 | -61.18 | 830 | 26991 |
| Fort Saint Vrain (historical) | city | Colorado | United States | 40.28 | -104.85 | 5029 | |
| Fort Salonga | city | New York | United States | 40.91 | -73.30 | 49 | |
| Fort San Carlos | city | Zulia | Venezuela | 10.99 | -71.61 | 0 | 8762 |
| Fort Sandeman | city | Balochistan | Pakistan | 31.34 | 69.45 | 5029 | 47287 |
| Fort Sanderman | city | Balochistan | Pakistan | 31.34 | 69.45 | 5029 | 47287 |
| Fort Saskatchewan | city | Alberta | Canada | 53.72 | -113.20 | 2043 | 10988 |
| Fort Saskatchewan (General Hospital) Heliport | airport | 53.70 | -113.22 | 2047 | 0 | ||
| Fort Saskačevanas | city | Alberta | Canada | 53.72 | -113.20 | 2043 | 10988 |
| Fort Scammel | city | Maine | United States | 43.65 | -70.21 | 0 | |
| Fort Schewtschenko | city | Mangghystau | Kazakhstan | 44.51 | 50.26 | -1689 | 115 |
| Fort Scott | city | Kansas | United States | 37.84 | -94.71 | 830 | |
| Fort Scott | city | Ohio | United States | 39.27 | -84.66 | 830 | |
| Fort Screven | city | Georgia | United States | 32.02 | -80.84 | 0 | |
| Fort Sedgwick (historical) | city | Colorado | United States | 40.94 | -102.38 | 3572 | |
| Fort Selden | city | New Mexico | United States | 32.48 | -106.91 | 4189 | |
| Fort Selkirk | city | Yukon | Canada | 62.77 | -137.38 | 1981 | 0 |
| Fort Selkirk Aerodrome | airport | 62.77 | -137.38 | 0 | |||
| Fort Seneca | city | Ohio | United States | 41.21 | -83.17 | 830 | |
| Fort Severn | city | Ontario | Canada | 55.98 | -87.65 | 3 | 208 |
| Fort Severn Airport | airport | 56.02 | -87.68 | 48 | 0 | ||
| Fort Seward | city | California | United States | 40.22 | -123.64 | 400 | |
| Fort Seybert | city | West Virginia | United States | 38.69 | -79.19 | 1669 | |
| Fort Shaw | city | Montana | United States | 47.51 | -111.81 | 3599 | |
| Fort Shawnee | city | Ohio | United States | 40.69 | -84.14 | 853 | |
| Fort Sherman | city | Grand Bassa | Liberia | 6.11 | -9.73 | 830 | 786 |
| Fort Sherman | city | Colon | Panama | 9.37 | -79.96 | 26 | 4824 |
| Fort Sherman Airport | airport | 9.37 | -79.95 | 10 | 0 | ||
| Fort Shevchenko | city | Mangghystau | Kazakhstan | 44.51 | 50.26 | -1689 | 115 |
| Fort Simpson | city | Northwest Territories | Canada | 61.85 | -121.33 | 830 | 415 |
| Fort Simpson (Great Slave No. 2) Heliport | airport | 61.84 | -121.33 | 480 | 0 | ||
| Fort Simpson Island Airport | airport | 61.87 | -121.37 | 405 | 0 | ||
| Fort Smith | city | Northwest Territories | Canada | 60.00 | -111.88 | 830 | 291 |
| Fort Smith | city | Arkansas | United States | 35.39 | -94.40 | 830 | |
| Fort Smith | city | Georgia | United States | 34.63 | -83.97 | 1706 | |
| Fort Smith | city | Montana | United States | 45.31 | -107.94 | 3349 | |
| Fort Smith (District) Heliport | airport | 60.00 | -111.91 | 665 | 0 | ||
| Fort Smith Water Aerodrome | airport | 60.02 | -111.89 | 554 | 0 | ||
| Fort Soufflay | city | Sangha | Congo | 2.02 | 14.90 | 1669 | 256 |
| Fort Spokane | city | Washington | United States | 47.90 | -118.31 | 1669 | |
| Fort Spring | city | Kentucky | United States | 38.04 | -84.63 | 898 | |
| Fort Spring | city | West Virginia | United States | 37.75 | -80.54 | 1952 | |
| Fort Spunky | city | Texas | United States | 32.33 | -97.65 | 830 | |
| Fort St. James | city | British Columbia | Canada | 54.43 | -124.25 | 2509 | 2301 |
| Fort St. James/Stuart River Seaplane Base | airport | 54.42 | -124.27 | 2238 | 0 | ||
| Fort St. John (Charlie Lake) Seaplane Base | airport | 56.28 | -120.97 | 2266 | 0 | ||
| Fort St. John (Hospital) Heliport | airport | 56.25 | -120.84 | 2304 | 0 | ||
| Fort Standish | city | Massachusetts | United States | 42.00 | -70.63 | 0 | |
| Fort Stanton | city | New Mexico | United States | 33.50 | -105.52 | 6200 | |
| Fort Stedman | city | Shan State | Burma | 20.57 | 96.94 | 3349 | 14900 |
| Fort Steele | city | British Columbia | Canada | 49.62 | -115.63 | 2565 | 34 |
| Fort Steele | city | Wyoming | United States | 41.78 | -106.95 | 6709 | |
| Fort Stetman | city | Shan State | Burma | 20.57 | 96.94 | 3349 | 14900 |
| Fort Stevens | city | Oregon | United States | 46.20 | -123.96 | 3 | |
| Fort Stewart | city | Donegal | Ireland | 55.02 | -7.59 | 0 | 1843 |
| Fort Stewart | city | Saint Mary | Jamaica | 18.24 | -76.74 | 413 | 20016 |
| Fort Stewart | city | Georgia | United States | 31.86 | -81.52 | 19 | |
| Fort Stewart House | city | Donegal | Ireland | 55.02 | -7.59 | 0 | 1843 |
| Fort Stockton | city | Texas | United States | 30.89 | -102.88 | 3349 | |
| Fort Stoddard | city | Alabama | United States | 31.10 | -87.98 | 19 | |
| Fort Stotsenburg | city | Pampanga | Philippines | 15.18 | 120.52 | 830 | 156913 |
| Fort Sumner | city | New Mexico | United States | 34.47 | -104.25 | 4189 | |
| Fort Supply | city | Oklahoma | United States | 36.57 | -99.57 | 2004 |