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Boulder, Colorado
(Boulder County)

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Welcome to Boulder ...

The city of Boulder is located in Boulder County<1> and is the County Seat for Boulder County.

When the people of Boulder refer to themselves (known as a demonym), they frequently use Boulderite<2>

From the  Census Estimates for 2019, Boulder has a population of 107,703 people<3> (see below for details).

While we don't have a date for the establishment of Boulder, you might get a feel for its founding by knowing that they incorporated November 4, 1871.

Boulder is 5,270 feet [1,606 m] above sea level.<4> In other words, the altitude of Boulder is about 1 mile [or ~1½ km] above sea level.

Time Zone: Boulder lies in the Mountain Time Zone (MST/MDT) and observes daylight saving time

Telephone area codes for Boulder: (303) & (720)<5>

The ZIP codes for Boulder: 80301-80304, 80306-80310, 80314, 80321-80323, 80328-80329<6>

Websites for Boulder ...

Official Website:   www.bouldercolorado.gov/

Chamber of Commerce:   www.boulderchamber.com/

Population Details ...

Taken from the 2019 Census Estimates, Boulder had an population of 107,703 people. This is an increase of 10.6% since the 2010 Census (or an increase of 13.76% since the 2000 Census).

At the time of the 2010 Census, Boulder had a population of 97,385 people (or 33.06% of the total population of Boulder County). This makes Boulder the county's most populous community.

The population of Boulder represents 1.94% of the total population of Colorado (which has 5,029,196 people), making it the state's 11th most populous community.

With a 2010 count of 97,385 people, the population of Boulder increased 2.86% from the 2000 Census (with a count of 94,673 people).

More information can be found on the Census Page for Boulder.

Communities Also Named Boulder ...

Using our Gazetteer, we have found that there are two Colorado communities named Boulder: This one is located in Boulder County and the other is located in Arapahoe County.

Beyond Colorado, there are 10 communities that are also named Boulder - they are located in British Columbia, California, Idaho, Illinois, Montana, Utah, Virginia, West Virginia and Wyoming.

For more information, see our Tidbits & Trivia Page for Boulder.

Communities near Boulder ...

We have created a list of 10 communities that are near Boulder.

  • Thornton [Adams County]
    • Jump to our Gazetteer entry for Thornton
    • Thornton [Adams County] lies 18 miles [29 km]<7> to the east of Boulder
    • Population from the 2020 Census: 148,113 people
    • Note: The GPS coordinates that we are using for Thornton have been provided by the GNIS.<8> The coordinates still need to be verified.
    • Jump to Google Maps centered on Thornton
    • Jump to TripAdvisor's Tourism page for Thornton<9>
  • Arvada [Jefferson County]
    • Jump to our Gazetteer entry for Arvada
    • Arvada [Jefferson County] lies 17 miles [27.4 km]<7> to the southeast of Boulder
    • Population from the 2020 Census: 121,936 people
    • Jump to Google Maps centered on Arvada
    • Jump to TripAdvisor's Tourism page for Arvada<9>
  • Westminster [Adams County]
    • Jump to our Gazetteer entry for Westminster
    • Westminster [Adams County] lies 17 miles [27.4 km]<7> to the southeast of Boulder
    • Population from the 2020 Census: 115,046 people
    • Jump to Google Maps centered on Westminster
    • Jump to TripAdvisor's Tourism page for Westminster<9>
  • Longmont [Boulder County]
    • Jump to our Gazetteer entry for Longmont
    • Longmont [Boulder County] lies 14 miles [22.5 km]<7> to the northeast of Boulder
    • Population from the 2020 Census: 98,445 people
    • Jump to Google Maps centered on Longmont
    • Jump to TripAdvisor's Tourism page for Longmont<9>
  • Continue List   (6 more) ...
    • Broomfield [Broomfield County]
      • Jump to our Gazetteer entry for Broomfield
      • Broomfield [Broomfield County] lies 12 miles [19.3 km]<7> to the east of Boulder
      • Population from the 2020 Census: 72,236 people
      • Note: The GPS coordinates that we are using for Broomfield have been provided by the GNIS.<8> The coordinates still need to be verified.
      • Jump to Google Maps centered on Broomfield
      • Jump to TripAdvisor's Tourism page for Broomfield<9>
    • Northglenn [Adams County]
      • Jump to our Gazetteer entry for Northglenn
      • Northglenn [Adams County] lies 17 miles [27.4 km]<7> to the southeast of Boulder
      • Population from the 2020 Census: 38,845 people
      • Note: The GPS coordinates that we are using for Northglenn have been provided by the GNIS.<8> The coordinates still need to be verified.
      • Jump to Google Maps centered on Northglenn
      • Jump to TripAdvisor's Tourism page for Northglenn<9>
    • Wheat Ridge [Jefferson County]
      • Jump to our Gazetteer entry for Wheat Ridge
      • Wheat Ridge [Jefferson County] lies 19 miles [30.6 km]<7> to the southeast of Boulder
      • Population from the 2020 Census: 31,857 people
      • Jump to Google Maps centered on Wheat Ridge
      • Jump to TripAdvisor's Tourism page for Wheat Ridge<9>
    • Erie [Boulder County]
      • Jump to our Gazetteer entry for Erie
      • Erie [Boulder County] lies 12 miles [19.3 km]<7> to the east of Boulder
      • Population from the 2020 Census: 30,318 people
      • Note: The GPS coordinates that we are using for Erie have been provided by the GNIS.<8> The coordinates still need to be verified.
      • Jump to Google Maps centered on Erie
      • Jump to TripAdvisor's Tourism page for Erie<9>
    • Lafayette [Boulder County]
      • Jump to our Gazetteer entry for Lafayette
      • Lafayette [Boulder County] lies 9 miles [14.5 km]<7> to the east of Boulder
      • Population from the 2020 Census: 28,579 people
      • Note: The GPS coordinates that we are using for Lafayette have been provided by the GNIS.<8> The coordinates still need to be verified.
      • Jump to Google Maps centered on Lafayette
      • Jump to TripAdvisor's Tourism page for Lafayette<9>
    • Golden [Jefferson County]
      • Jump to our Gazetteer entry for Golden
      • Golden [Jefferson County] lies 18 miles [29 km]<7> to the south of Boulder
      • Population from the 2020 Census: 20,347 people
      • Jump to Google Maps centered on Golden
      • Jump to TripAdvisor's Tourism page for Golden<9>

To Help With Your Genealogy Research ...

We have a couple of sections for those tracing their genealogy.

We created a list of cemeteries that are in the area around Boulder. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Boulder.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Boulder. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Boulder.

We also have a detailed list of newspapers that have been published in the area around Boulder. Our list includes 55 papers. See our Newspapers Page for Boulder.

TripAdvisor Tourism Pages for Boulder ...

Looking for more information about Boulder? A wonderful source is the TripAdvisor website. We always start with the TripAdvisor Tourism page, where you can read an overview with links that will help you find lodging, restaurants and attractions.

In addition to the Tourism page for Boulder, there are neighboring communities that also have Tourism pages. More information about those communities can be found on our TripAdvisor Page for Boulder.

Adding Boulder to Our Gazetteer ...

We originally found mention of Boulder in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.

In addition, our notes show that the earliest dated mention that we've found for Boulder was in the Business Atlas and Shippers' Guide (1895).

For more details about the above, see References and Mentions for Boulder on our Genealogy Page.

Index of Cities, Towns and Villages for Colorado

About Boulder County

About Colorado

The official website for Boulder: www.bouldercolorado.gov/

The official website for Boulder County: www.co.boulder.co.us/

The official website for State of Colorado: https://www.colorado.gov/

Footnotes ...

<1>If you're interested in how the shape of Colorado's counties, including Boulder, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>A demonym is the name for a resident of a community which is usually derived from (or is related to) the name of that community. In other words, it's how the residents of Boulder refer to themselves. It's important to note that there aren't any rules for taking a city's name and turning it into a demonym. A demonym is informal and while the majority of Boulder may use one name, keep in mind that others may use something different.
<3>Population counts have been provided by the U.S. Census Bureau. For more detail, please visit our Census Page for Boulder.
<4>The elevation is an estimate for the area around Boulder - it will be higher in some places and lower in others.
<5>Area code (720) is an overlay for area code (303).
<6>ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a city (such as Boulder). When looking for a ZIP Code, whether Boulder or elsewhere, it's always best to check the website of the United States Postal Service (USPS).

Our list of ZIP Codes for Boulder includes: 80301, 80302, 80303, 80306, 80307, 80308, 80309, 80314, 80321, 80322, 80328 & 80329.
<7>Our distances are not driving distances, but are calculated as a 'straight-line' (or point-to-point) distance. A straight line distance ignores obstructions like rivers, canyons, lakes, et cetera - it's truly a line drawn from Point A (ie- Boulder) to Point B.If you need the driving distance, we recommend that you use one of the Mapping Services listed on our Map Page for Boulder. Since we usually use Google Maps for our own planning, we've provided the following link: Google Map and Driving Directions starting from BoulderOur distance measurements begin at a specific point in Boulder. The point we use is located at these GPS coordinates - Latitude: 40.0158, Longitude: -105.2793    
<8>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 have found that accuracy can vary and you should double-check the location if accuracy is required.
<9>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.






















 

 

 

 

 


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This page was last modified: 08 Aug 2022