| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Calk (historical) | city | Kentucky | United States | 38.03 | -83.96 | 1000 | |
| Calkins | city | Oregon | United States | 43.22 | -123.41 | 400 | |
| Calkins | city | Pennsylvania | United States | 41.66 | -75.16 | 1669 | |
| Calkins (historical) | city | California | United States | 40.66 | -122.19 | 830 | |
| Calkins (historical) | city | Montana | United States | 46.44 | -110.92 | 5091 |