Thornton is a city located in Adams County, Colorado. With a 2020 population of 143,890, it is the 6th largest city in Colorado and the 187th largest city in the United States. Thornton is currently growing at a rate of 1.57% annually and its population has increased by 21.15% since the most recent census, which recorded a population of 118,772 in 2010. Spanning over 38 miles, Thornton has a population density of 4,009 people per square mile.
The average household income in Thornton is $90,680 with a poverty rate of 8.87%. The median rental costs in recent years comes to $1,398 per month, and the median house value is $290,100. The median age in Thornton is 33.6 years, 32.5 years for males, and 34.4 years for females. For every 100 females there are 99.8 males.
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.
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.