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Welcome to Adams County ...

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

The community of Brighton is the Seat for Adams County.

Adams County was founded April 15, 1901 and was created by taking area from Arapahoe County.

From the Census Estimates for 2019, <1> Adams had a population of 517,421 people. This is an increase of 16.62% since the last Census (which gave a population of 443,691 people in 2010).

At the time of the 2010 Census, Adams represented 8.82% of the total population of Colorado.

Below are some of the communities located in Adams County:

  • Bennett
    (24 miles [38.6 km] to the east)
    • Bennett is located in Adams County (CO)
    • Jump to our Gazetteer entry for Bennett
    • Population from the 2020 Census: 3,017 people
    • Jump to TripAdvisor's Tourism page for Bennett <2>
  • Brighton
    (8 miles [12.9 km] to the north)
  • Commerce City
    (4 miles [6.4 km] to the east)
  • Federal Heights
    (7 miles [11.3 km] to the west)
  • Northglenn
    (6 miles [9.7 km] to the northwest)
  • Thornton
    (5 miles [8 km] to the northwest)
    • Thornton is located in Adams County (CO)
    • Jump to our Gazetteer entry for Thornton
    • Population from the 2020 Census: 148,113 people
    • Jump to TripAdvisor's Tourism page for Thornton <2>
  • Westminster
    (9 miles [14.5 km] to the west)

Websites of Interest ...

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. For more information, please visit the U.S. Census Bureau.
<2>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.