Welcome to Boulder County ...
Time Zone: Boulder County lies in the Mountain Time Zone (MST/MDT) and observes daylight saving time.
The community of Boulder is the Seat for Boulder County.
Boulder County is one of the original counties of Colorado and was founded November 1, 1861.
From the Census Estimates for 2019, <1> Boulder had a population of 326,020 people. This is an increase of 10.68% since the last Census (which gave a population of 294,567 people in 2010).
At the time of the 2010 Census, Boulder represented 5.86% of the total population of Colorado.
Below are some of the communities located in Boulder County:
- Boulder
(5 miles [8 km] to the southwest)
- Erie
(8 miles [12.9 km] to the east)
- Note: The GPS coordinates that we are using for Erie have been provided by the GNIS.<3> The coordinates still need to be verified.
- Jump to our Gazetteer entry for Erie
- Erie is located in Boulder County (CO)
- Population from the 2020 Census: 30,318 people
- Jump to TripAdvisor's Tourism page for Erie <2>
- Jamestown
(11 miles [17.7 km] to the west)
- Lafayette
(6 miles [9.7 km] to the southeast)
- Note: The GPS coordinates that we are using for Lafayette have been provided by the GNIS.<3> The coordinates still need to be verified.
- Jump to our Gazetteer entry for Lafayette
- Lafayette is located in Boulder County (CO)
- Population from the 2020 Census: 28,579 people
- Jump to TripAdvisor's Tourism page for Lafayette <2>
- Longmont
(9 miles [14.5 km] to the northeast)
- Louisville
(6 miles [9.7 km] to the southeast)
- Lyons
(12 miles [19.3 km] to the north)
- Jump to our Gazetteer entry for Lyons
- Lyons is located in Boulder County (CO)
- Population from the 2020 Census: 2,058 people
- Jump to TripAdvisor's Tourism page for Lyons <2>
- Nederland
(17 miles [27.4 km] to the west)
- Jump to our Gazetteer entry for Nederland
- Nederland is located in Boulder County (CO)
- Population from the 2020 Census: 1,557 people
- Former names for Nederland:
- Browns Crossing
- Dayton
- Middle Boulder
- Jump to TripAdvisor's Tourism page for Nederland <2>
- Superior
(8 miles [12.9 km] to the south)
- Note: The GPS coordinates that we are using for Superior have been provided by the GNIS.<3> The coordinates still need to be verified.
- Jump to our Gazetteer entry for Superior
- Superior is located in Boulder County (CO)
- Population from the 2020 Census: 13,413 people
- Jump to TripAdvisor's Tourism page for Superior <2>
- Ward
(16 miles [25.7 km] to the west)
- Note: The GPS coordinates that we are using for Ward have been provided by the GNIS.<3> The coordinates still need to be verified.
- Jump to our Gazetteer entry for Ward
- Ward is located in Boulder County (CO)
- Population from the 2020 Census: 168 people
- Jump to TripAdvisor's Tourism page for Ward <2>
Websites of Interest ...
- Websites specific to Colorado
- Websites specific to Boulder County
- Websites for nearby counties
- Adams County
- Gilpin County
- Grand County
- Jefferson County
- Larimer County
- Weld County
- Cemetery Information and Directories
Footnotes ...
| <1> | On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census. |
| <2> | While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program. |
| <3> | The location has been supplied by the Geographic Names Information System - which is maintained by the U.S. Geological Survey (USGS). While these values should be definitive, we found that accuracy can vary and you should double-check the location if accuracy is required. |