Boulder, Colorado
Boulder is a city in Boulder County, Colorado, with an estimated population of 105,898 in 2023. It sits at 40.0244, -105.2513 in the America/Denver time zone.
| Field | Value |
|---|---|
| Place name | Boulder |
| Type | city |
| State | Colorado (CO) |
| County | Boulder County |
| Population (2023 est.) | 105,898 |
| Land area | 26.89 sq mi (69.66 km²) |
| Coordinates | 40.0244, -105.2513 |
| Time zone | America/Denver |
| ZIP codes | 80301, 80302, 80303, 80304, 80305, 80306, 80307, 80308, 80309, 80310, 80314 |
| Telephone area codes | 303, 720 |
ZIP codes and area codes for Boulder
Boulder covers 11 ZIP codes: 80301, 80302, 80303, 80304, 80305, 80306, 80307, 80308, 80309, 80310, 80314. Telephone area codes serving the area: 303, 720. Browse all ZIP codes in Colorado for the full list.
Where is Boulder?
Boulder is located in Colorado, in Boulder County. The coordinates above can be pasted directly into any map service. The nearest indexed places are listed below, which is a useful check when two states share a place name.
Nearby places
Louisville 11 km · COSuperior 13 km · COLafayette 13 km · COJamestown 16 km · COErie 18 km · COBroomfield 19 km · COLongmont 21 km · COLyons 22 km · CO
Other places in Boulder County
Longmont 98,630Lafayette 30,439Louisville 20,390Superior 13,361Lyons 2,151Nederland 1,488Jamestown 245
Related
Frequently asked questions
What county is Boulder, CO in?
Boulder is in Boulder County, Colorado.
What is the population of Boulder, CO?
The 2023 Census Bureau estimate is 105,898.
What time zone is Boulder in?
Boulder is in the America/Denver time zone.