Towns
| State | City/Town | Town Title |
|---|---|---|
| Colorado | Mack | Mack, CO |
| Colorado | Manassa | Manassa, CO |
| Colorado | Mancos | Mancos, CO |
| Colorado | Manitou Springs | Manitou Springs, CO |
| Colorado | Manzanola | Manzanola, CO |
| Colorado | Marvel | Marvel, CO |
| Colorado | Masonville | Masonville, CO |
| Colorado | Matheson | Matheson, CO |
| Colorado | Maybell | Maybell, CO |
| Colorado | Mc Clave | Mc Clave, CO |
| Colorado | Mc Coy | Mc Coy, CO |
| Colorado | Mcclave | Mcclave, CO |
| Colorado | Mccoy | Mccoy, CO |
| Colorado | Mead | Mead, CO |
| Colorado | Meeker | Meeker, CO |
| Colorado | Meredith | Meredith, CO |
| Colorado | Merino | Merino, CO |
| Colorado | Mesa | Mesa, CO |
| Colorado | Mesa Verde National Park | Mesa Verde National Park, CO |
| Colorado | Milliken | Milliken, CO |
| Colorado | Minturn | Minturn, CO |
| Colorado | Model | Model, CO |
| Colorado | Moffat | Moffat, CO |
| Colorado | Molina | Molina, CO |
| Colorado | Monarch | Monarch, CO |