| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Sigby Corners | city | New York | United States | 42.86 | -75.49 | 1669 | |
| Sigel | city | Illinois | United States | 39.23 | -88.49 | 830 | |
| Sigel | city | Pennsylvania | United States | 41.28 | -79.11 | 1794 | |
| Sightly | city | Washington | United States | 46.30 | -122.71 | 830 | |
| Sighóla | city | New Mexico | United States | 34.06 | -106.89 | 4596 | |
| Siglerville | city | Pennsylvania | United States | 40.74 | -77.53 | 830 | |
| Siglo | city | Tennessee | United States | 35.59 | -87.13 | 830 | |
| Siglo Viente | city | Florida | United States | 27.96 | -82.44 | 19 | |
| Sigma | city | Alabama | United States | 31.28 | -85.20 | 196 | |
| Sigma | city | Michigan | United States | 44.67 | -85.05 | 1135 | |
| Sigma | city | Virginia | United States | 36.83 | -82.94 | 2070 | |
| Sigma | city | Virginia | United States | 36.73 | -75.99 | 6 | |
| Sigman | city | West Virginia | United States | 38.58 | -81.76 | 928 | |
| Sigmund | city | Pennsylvania | United States | 40.47 | -75.56 | 830 | |
| Sign Pine | city | North Carolina | United States | 36.31 | -76.62 | 29 | |
| Sign Pine (historical) | city | Virginia | United States | 36.63 | -76.24 | 19 | |
| Sign Post | city | Virginia | United States | 38.00 | -75.46 | 26 | |
| Sign Rock | city | Virginia | United States | 36.83 | -79.11 | 830 | |
| Signal | city | Arizona | United States | 34.47 | -113.63 | 1669 | |
| Signal | city | Mississippi | United States | 32.40 | -90.85 | 298 | |
| Signal | city | Ohio | United States | 40.80 | -80.66 | 1099 | |
| Signal (historical) | city | Missouri | United States | 38.03 | -91.82 | 892 | |
| Signal Butte | city | California | United States | 41.28 | -122.19 | 4225 | |
| Signal Butte (historical) | city | Montana | United States | 45.95 | -106.35 | 3349 | |
| Signal Hill | city | Illinois | United States | 38.58 | -90.06 | 830 | |
| Signal Hill | city | California | United States | 33.80 | -118.17 | 150 | |
| Signal Hill Apartments | city | North Carolina | United States | 35.79 | -80.85 | 830 | |
| Signal Hills | city | Tennessee | United States | 35.10 | -85.33 | 830 | |
| Signal Mobile Home Park | city | New York | United States | 42.97 | -75.44 | 974 | |
| Signal Mountain | city | Tennessee | United States | 35.12 | -85.34 | 1699 | |
| Signal Point | city | Georgia | United States | 34.01 | -84.65 | 1095 | |
| Signal Point Subdivision | city | Alabama | United States | 34.37 | -86.25 | 1003 | |
| Signal Port (historical) | city | California | United States | 38.83 | -123.62 | 0 | |
| Signal Terrace | city | Tennessee | United States | 35.14 | -85.33 | 1814 | |
| Signal Village | city | Arizona | United States | 31.55 | -110.36 | 5029 | |
| Signboard | city | Virginia | United States | 37.90 | -77.41 | 200 | |
| Signpine | city | Virginia | United States | 37.44 | -76.64 | 49 | |
| Sigourney | city | Iowa | United States | 41.33 | -92.20 | 830 | |
| Sigsbee | city | Alabama | United States | 34.34 | -85.71 | 1197 | |
| Sigsbee | city | Georgia | United States | 31.27 | -83.86 | 328 | |
| Sigsbee | city | Minnesota | United States | 43.69 | -93.21 | 1256 | |
| Sigsbee | city | Missouri | United States | 39.91 | -91.87 | 830 | |
| Sigsbee | city | Pennsylvania | United States | 39.83 | -79.96 | 898 | |
| Sigsbee | city | South Carolina | United States | 34.99 | -82.01 | 879 | |
| Sigurd | city | Utah | United States | 38.84 | -111.97 | 5275 | |
| Sigurd (historical) | city | Georgia | United States | 32.15 | -82.99 | 200 |