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  •   State: 
    Jefferson County
      County all: 
    Jefferson | Adams
      County FIPS: 
    08059 | 08001
    39°50′10″N 105°2′14″W
      Area total: 
    33.898 sq mi (87.796 km²)
      Area land: 
    31.585 sq mi (81.806 km²)
      Area water: 
    2.313 sq mi (5.990 km²)
    5,384 ft (1,641 m)
    1859; Settled 1859 Platted 1885 as DeSpain Junction, later Harris; Incorporated May 24, 1911 as the Town of Westminster
  •   Latitude: 
      Dman name cbsa: 
    Denver-Aurora-Lakewood, CO
    Mountain Standard Time (MST) UTC-7:00; Mountain Daylight Time (MDT) UTC-6:00
      ZIP codes: 

    Westminster, Jefferson County, Colorado, United States

  •   Population density: 
    3,683 residents per square mile of area (1,422/km²)
      Household income: 
      Unemployment rate: 
  •   Sales taxes: 
      Income taxes: 

The City of Westminster is a home rule municipality located in Adams and Jefferson counties, Colorado, United States. The city population was 116,317 at the 2020 United States Census with 71,240 residing in Adams County and 45,077 residing in Jefferson County. Westminster is the eighth most populous city in Colorado. Gold discovered in the South Platte River Valley in 1858 brought national attention to the area that would become Westminster, Colorado. In 1890, New Yorker Henry T. Mayham convinced the Denver Presbytery to build a university on land that he owned in Harris. The school was built from red sandstone quarried in Colorado's Red Rocks region. In 1911, Harris voted to incorporate as a city and changed its name to Westminster, in honor of the university which is now on the National Register of Historic Places. In July 2006, it was ranked as the 24th best place to live in the US by Money magazine. Westminsters' first permanent settler was Kentucky farmer Pleasant DeSpain, who built his home in 1870 on 160 acres (near what is now West 76th Avenue and Lowell Street). The area became known as DeSpain Junction and attracted other settlers including Edward Bruce Bowles, who in 1881 constructed a brick Italianate house now known as the Bowles House. The unveiling of the Bell Tower in 1986 was attended by the then mayor of Westminster, England. The 130-foot spire was first conceptualized as a symbolic tie and tribute to the clock tower of Westminster Palace in England known as Big Ben.

Air Quality, Water Quality, Superfund Sites & UV Index

The Air Quality index is in Westminster, Adams County, Colorado = 86.8. These Air Quality index is based on annual reports from the EPA. Higher values are better (100=best). The number of ozone alert days is used as an indicator of air quality, as are the amounts of seven pollutants including particulates, carbon monoxide, sulfur dioxide, lead, and volatile organic chemicals. The Water Quality Index is 81. A measure of the quality of an area’s water supply as rated by the EPA. Higher values are better (100=best). The EPA has a complex method of measuring the watershed quality, using 15 indicators such as pollutants, turbidity, sediments, and toxic discharges. The Superfund Sites Index is 10. Higher is better (100=best). Based upon the number and impact of EPA Superfund pollution sites in the county, including spending on the cleanup efforts. The UV Index in Westminster = 5.1 and is a measure of an area's exposure to the sun's ultraviolet rays. This is most often a combination of sunny weather, altitude, and latitude. The UV Index has been defined by the WHO ( and is uniform worldwide.


The most recent city population of individuals with a median age of 35.2 age the population grows by 5.03% in Westminster, Adams County, Colorado population since 2000 and are distributed over a density of 3,683 residents per square mile of area (1,422/km²). There are average 2.6 people per household in the 40,580 households with an average household income of $65,275 a year. The unemployment rate in Alabama is 6.20% of the available work force and has dropped -4.90% over the most recent 12-month period and the projected change in job supply over the next decade based on migration patterns, economic growth, and other factors will increase by 24.00%. The number of physicians in Westminster per 100,000 population = 69.5.


The annual rainfall in Westminster = 14.3 inches and the annual snowfall = 43 inches. The annual number of days with measurable precipitation (over .01 inch) = 73. The average number of days per year that are predominantly sunny = 242. 89 degrees Fahrenheit is the average daily high temperature for the month of July and 19.2 degrees Fahrenheit is the average daily low temperature for the month of January. The Comfort Index (higher=better) is 57, where higher values mean a more pleasant climate. The Comfort Index measure recognizes that humidity by itself isn't the problem. (Have you noticed nobody ever complains about the weather being 'cold and humid?) It's in the summertime that we notice the humidity the most, when it's hot and muggy. Our Comfort Index uses a combination of afternoon summer temperature and humidity to closely predict the effect that the humidity will have on people.

Median Home Cost

The percentage of housing units in Westminster, Adams County, Colorado which are owned by the occupant = 67.27%. A housing unit is a house, apartment, mobile home, or room occupied as separate living quarters. The average age of homes = 23 years with median home cost = $176,020 and home appreciation of -1.80%. This is the value of the years most recent home sales data. Its important to note that this is not the average (or arithmetic mean). The median home price is the middle value when you arrange all the sales prices of homes from lowest to highest. This is a better indicator than the average, because the median is not changed as much by a few unusually high or low values. The property tax rate of $7.37 shown here is the rate per $1,000 of home value. If for simplification for example the tax rate is $14.00 and the home value is $250,000, the property tax would be $14.00 x ($250,000/1000), or $3500. This is the 'effective' tax rate.


The local school district spends $5,026 per student. There are 16.8 students for each teacher in the school, 275 students for each Librarian and 406 students for each Counselor. 8.03% of the area’s population over the age of 25 with an Associate Degree or other 2-year college degree, 22.71% with a master’s degree, Ph.D. or other advanced college degree and 9.55% with high school diplomas or high school equivalency degrees (GEDs).

  • Westminster's population in Adams County, Colorado of 3,024 residents in 1900 has increased 38,46-fold to 116,317 residents after 120 years, according to the official 2020 census.

    Approximately 49.75% female residents and 50.25% male residents live in Westminster, Adams County, Colorado.

    As of 2020 in Westminster, Adams County, Colorado are married and the remaining 41.00% are single population.

  • 29.3 minutes is the average time that residents in Westminster require for a one-way commute to work. A long commute can have different effects on health. A Gallup poll in the US found that in terms of mental health, long haul commuters are up to 12 percent more likely to experience worry, and ten percent less likely to feel well rested. The Gallup poll also found that of people who commute 61­–90 minutes each day, a whopping one third complained of neck and back pain, compared to less than a quarter of people who only spend ten minutes getting to work.

    79.72% of the working population which commute to work alone in their car, 10.27% of the working population which commutes to work in a carpool, 3.92% of the population that commutes using mass transit, including bus, light rail, subway, and ferry. 4.04% of the population that has their home as their principal place of work.

  • Of the total residential buildings in Westminster, Adams County, Colorado, 67.27% are owner-occupied homes, another 27.67% are rented apartments, and the remaining 5.06% are vacant.

  • The 55.35% of the population in Westminster, Adams County, Colorado who identify themselves as belonging to a religion are distributed among the following most diverse religions.

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