| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Cos Cob | city | Connecticut | United States | 41.03 | -73.60 | 13 | |
| Cos Jacket | city | Alaska | United States | 64.86 | -151.41 | 216 | |
| Cosby | city | Missouri | United States | 39.86 | -94.68 | 974 | |
| Cosby | city | South Carolina | United States | 32.58 | -81.25 | 39 | |
| Cosby | city | Tennessee | United States | 35.82 | -83.25 | 1669 | |
| Cosciusco | city | Mississippi | United States | 33.06 | -89.59 | 830 | |
| Coseytown | city | Pennsylvania | United States | 39.73 | -77.79 | 830 | |
| Cosfort (historical) | city | North Carolina | United States | 36.10 | -81.33 | 1190 | |
| Cosgrave | city | Nevada | United States | 40.80 | -118.02 | 4340 | |
| Cosgrove | city | Arkansas | United States | 33.31 | -91.40 | 114 | |
| Cosgrove | city | Iowa | United States | 41.64 | -91.74 | 830 | |
| Coshocton | city | Ohio | United States | 40.27 | -81.86 | 830 | |
| Coskata | city | Massachusetts | United States | 41.35 | -70.02 | 6 | |
| Cosme | city | Florida | United States | 28.11 | -82.57 | 42 | |
| Cosmo | city | Florida | United States | 30.36 | -81.52 | 45 | |
| Cosmopolis | city | Washington | United States | 46.96 | -123.77 | 45 | |
| Cosmos | city | Minnesota | United States | 44.94 | -94.70 | 1099 | |
| Cosmos | city | Ohio | United States | 40.27 | -84.78 | 1049 | |
| Cosmos Mobile Home Park | city | Minnesota | United States | 44.94 | -94.70 | 1099 | |
| Cosmus | city | Pennsylvania | United States | 40.95 | -79.54 | 951 | |
| Cosnino | city | Arizona | United States | 35.21 | -111.47 | 6709 | |
| Coso | city | California | United States | 35.98 | -117.93 | 3395 | |
| Coso Junction | city | California | United States | 36.04 | -117.95 | 3382 | |
| Cospers Bend | city | Alabama | United States | 33.28 | -86.43 | 380 | |
| Cosperville | city | Indiana | United States | 41.48 | -85.47 | 895 | |
| Coss Corners | city | New York | United States | 42.28 | -77.37 | 1797 | |
| Cossart | city | Pennsylvania | United States | 39.85 | -75.60 | 200 | |
| Cossart Creek | city | Delaware | United States | 39.83 | -75.62 | 400 | |
| Cossart Creek | city | Pennsylvania | United States | 39.83 | -75.62 | 400 | |
| Cossayuna | city | New York | United States | 43.18 | -73.43 | 830 | |
| Cossinade | city | Louisiana | United States | 30.04 | -92.32 | 9 | |
| Cosson Mill | city | Florida | United States | 30.70 | -86.18 | 141 | |
| Cossville | city | Missouri | United States | 37.33 | -94.45 | 898 | |
| Cost | city | Texas | United States | 29.44 | -97.53 | 318 | |
| Costa Azul | city | Puerto Rico | United States | 17.98 | -66.10 | 32 | |
| Costa Brava | city | Puerto Rico | United States | 18.51 | -67.03 | 111 | |
| Costa Dorado | city | Puerto Rico | United States | 18.48 | -66.27 | 6 | |
| Costa Este | city | Puerto Rico | United States | 18.15 | -65.82 | 88 | |
| Costa Mesa | city | California | United States | 33.64 | -117.92 | 29 | |
| Costa Mesa (Orange County) | city | California | United States | 33.64 | -117.92 | 29 | |
| Costa Mesa Mobile Home Estates | city | California | United States | 33.66 | -117.91 | 3 | |
| Costa Mobile Home Park | city | New Jersey | United States | 40.88 | -74.08 | 68 | |
| Costa Sur | city | Puerto Rico | United States | 17.97 | -66.09 | 26 | |
| Costa de Oro | city | Puerto Rico | United States | 18.47 | -66.28 | 19 | |
| Costa del Norte (historical) | city | Puerto Rico | United States | 18.47 | -66.12 | 0 | |
| Costal Azul | city | Puerto Rico | United States | 18.38 | -65.72 | 3 | |
| Costello | city | Pennsylvania | United States | 41.59 | -78.06 | 1204 | |
| Costelow | city | Kentucky | United States | 36.99 | -86.77 | 830 | |
| Costen | city | Maryland | United States | 38.10 | -75.62 | 19 | |
| Coster | city | Iowa | United States | 42.67 | -92.71 | 1000 | |
| Coster | city | Maryland | United States | 38.36 | -76.47 | 3 | |
| Coster Yards | city | Tennessee | United States | 35.99 | -83.94 | 941 | |
| Costigan | city | Maine | United States | 45.01 | -68.64 | 127 | |
| Costilla | city | New Mexico | United States | 36.98 | -105.53 | 7814 | |
| Costilla (historical) | city | Alabama | United States | 31.11 | -85.89 | 229 | |
| Costin | city | Nebraska | United States | 41.86 | -103.73 | 4189 | |
| Costin | city | North Carolina | United States | 34.58 | -78.10 | 49 | |
| Costonia | city | Ohio | United States | 40.43 | -80.62 | 830 | |
| Cosumne | city | California | United States | 38.49 | -121.17 | 124 | |
| Cosy Dell | city | California | United States | 34.28 | -117.45 | 3349 |