Thornton, Colorado Population 2022

146,487
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Thornton is a city located in Colorado. With a 2020 population of 146,487, it is the 6th largest city in Colorado and the 195th largest city in the United States. Thornton is currently growing at a rate of 1.60% annually and its population has increased by 1.60% since the most recent census, which recorded a population of 144,186 in 2020. Spanning over 38 miles, Thornton has a population density of 4,081 people per square mile.

The average household income in Thornton is $93,814 with a poverty rate of 8.50%. The median rental costs in recent years comes to $1,485 per month, and the median house value is $349,000. The median age in Thornton is 33.8 years, 33.1 years for males, and 34.4 years for females.

The city of Thornton is a home rule municipality located in Colorado. Situated in Weld and Adams counties, and the northeast region of the Denver-Aurora-Broomfield, CO Metropolitan Statistical Area, Thornton is about 10 miles north-northeast of downtown Denver, the most populous city of Colorado.

Population Growth

In 1960, four years after Thornton was incorporated as a city, the population stood at 11,353. The years between 1970 and 1980 saw a huge growth from 13,326 to 42,054, and an annual growth rate of 12.18%. This could be attributed to the annexation of neighboring communities.

As of 2019, the population of Thornton, Colorado stands at 137,000, with a percentage growth of over 1,000% in the 60 years since the city was incorporated in 1956. Colorado is now the 7th fastest-growing state in the U.S. with much of the growth in the Metro Denver area. Since the 1930s, Metro Denver's growth rate has outpaced the national average (http://www.metrodenver.org/do-business/demographics/population/) and this growth has included the area of Thornton.

Up until 1953, Thornton consisted exclusively of farmland. A purchase that year by Sam Hoffman saw the planning of the first community in Adams County. It was the first to offer full municipal services from a single tax levy, including services such as free trash pickup and recreation. By the end of 1955, Thornton had over 5000 residents in over 1,200 homes. Thornton was incorporated as a city a year later in 1956.

June of 1981 saw Thornton receiving one of the two most destructive tornados in the Denver metropolitan area’s history, causing damage totaling over $15 million. The second touched down in the nearby Denver suburb of Lakewood. These were followed by three more just 7 years later in 1988.

Thornton Demographics

According to the most recent ACS, the racial composition of Thorntonwas:

  • White: 78.05%
  • Two or more races: 9.17%
  • Asian: 4.91%
  • Other race: 4.76%
  • Black or African American: 2.22%
  • Native American: 0.89%
  • Native Hawaiian or Pacific Islander: 0.01%
The current population of Thornton, Colorado is 146,487 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 144,186.

Thornton, Colorado Population 2022

Population by Race

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Thornton Population by Race

Thornton Population Pyramid 2022

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Thornton Median Age

33.5


Total

32.6


Male

34.3


Female

Thornton Adults

There are 104,146 adults, (13,396 of whom are seniors) in Thornton.

Thornton Age Dependency

Age Dependency Ratio

14.8

Old Age Dependency Ratio

44.1

Child Dependency Ratio

Thornton Sex Ratio

Female

72,051

49.97%

Male

72,135

50.03%

Thornton Population by Age

Thornton Renter vs Owner Occupied by Household Type

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Thornton Household Types

72.6%

Rate of Home Ownership

Thornton Households and Families

3.56

Average Family Size

3.07

Average Household Size

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Thornton Households by Type

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Thornton Educational Attainment by Sex (over 25)

Thornton Educational Attainment by Race

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The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 38.43%.

Thornton Educational Attainment by Race

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$46,516

Average Earnings

$54,456

Average Male

$37,478

Average Female

Thornton Earnings by Educational Attainment

Thornton Language by Age

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Thornton Language

75.34% of Thornton residents speak only English, while 24.66% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 18.46% of the population.

Thornton Language

Thornton Poverty by Race

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8.50%

Overall Poverty Rate

7.15%

Male Poverty Rate

9.85%

Female Poverty Rate

Poverty in Thornton

The race most likely to be in poverty in Thornton is Islander, with 75.00% below the poverty level.

The race least likely to be in poverty in Thornton is Other, with NaN% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.74%. Among those working part-time, it was 12.26%, and for those that did not work, the poverty rate was 16.00%.

Thornton Poverty

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Thornton Poverty Rate by Education

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Thornton Poverty Rate by Employment Status and Sex

Thornton Income by Household Type

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Income by Household Type

Thornton Marital Status

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Marriage Rates

51.8%

Overall Marriage Rate

51.8%

Male Marriage Rate

51.7%

Female Marriage Rate

Thornton Married by Age and Sex

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Thornton Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Thornton Marital Status by Race

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Thornton Marital Status

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7,489

Number of Veterans

Male Veterans

Female Veterans

Thornton Veterans by War

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Thornton Veterans by Age

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Thornton Veterans by Race

Thornton Veterans by Education

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2.73%

Veteran Poverty Rate

20.98%

Veteran Disability Rate

Thornton Veterans by Education

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72.9%

Labor Force Participation

70%

Employment Rate

4%

Unemployment Rate

Thornton Employment by Age

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Thornton Employment by Race

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Thornton Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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52.51%

Born in Thornton

86.74%

Native Born

13.26%

Foreign Born

8.28%

Non Citizen

4.98%

Naturalized

Place of Birth

86.74% of Thornton residents were born in the United States, with 52.51% having been born in Colorado. 8.28% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Thornton Place of Birth

Note: 2021 and 2022 data is projected

Thornton Population by Year