Colorado cities which start with the letter O.
| Place | Place Type | 2010 Population |
|---|---|---|
| Oak Creek | town | 884 |
| Ohio City | ||
| Ojo | ||
| Olathe | town | 1849 |
| Old Snowmass | ||
| Olney Springs | town | 345 |
| Ophir | town | 159 |
| Orchard | ||
| Orchard City | town | 3119 |
| Ordway | town | 1080 |
| Ortiz | ||
| Otis | town | 475 |
| Ouray | city | 1000 |
| Ovid | town | 318 |
| Oxford |
Browse CO Cities by Letter
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