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Population and Demography of Colorado

Colorado is a state in the Western United States. It is bordered by Wyoming to the north, Nebraska to the northeast, Kansas to the east, Oklahoma to the southeast, New Mexico to the south, Utah to the west, and Arizona to the southwest at the Four Corners. 

Colorado is the 21st most populous U.S. state. The total Land area is 103,718 square miles (268,875 square kilometers) and there is an average of 55 people for every square mile. This makes Colorado the 37th most densely populated state in the US. As per the  United States Census Bureau, the population of Colorado in 2020 was 5,773,714 (5.77 million)

Estimated Population of Colorado in 2024 – 5,877,610 or 5.9 million 

Colorado Population (2010-2020)

Colorado has a population growth rate of 14.8% during 2010-2020. It has population increase of  744,518 since 2010. The median age is 36.4, with 49.8% Female, and 50.1% Male. 

 Colorado Census 2020
Total Population5,773,714 (5.77 million)
Median Age36.4
Population Rank21st
Total Land Area103,718 sq mi (268,875 km2)
Area Rank8th
Population Density55/sq mi (21/km2)
Capital CityDenver
Largest CityDenver

Source: US Census 2020

Colorado Historical Population

Colorado has a population growth rate during of 14.8% from 2010-2020.  In the year 1900, Colorado’s population was 0.5 million and in 2020 it reached 5.7 million, an increase of 5 million.

Let’s look at decade population and percentage change

CensusPopulation% Change

Source: US Census 2020

Religion and affiliations

Christianity is the majority religion in Colorado followed by 64% of the population.  The largest Christian denomination in California is Protestant (43%); Roman Catholic (16%); Mormonism (2%); Eastern Orthodoxy (1%) Next comes the Unaffiliated population, 29% of the population doesn’t follow or adhere to any faith or religion.

Other non-Christian-based religions and faiths are followed by 5% of the population and include Hindu, Jewish, Buddhist, and Islam.

Source: Pew Research Center

For more details read Religion in Colorado

Race and Ethnicity in Colorado 

In 2020, the White alone (non-Hispanic) population was the largest racial or ethnic group in Colorado, comprising 65.13% of the total population. It was followed by the Hispanic or Latino population whose share was 21.88%. Two or more race population was the third largest group at 4.52%. Black or African Americans are at 3.83% & Asians are at 3.38%

Ancestry in Colorado 

As per Census Studies and estimates German, Irish, English, Italian & American have made the five largest ancestry groups in Colorado. 

For more Details read Race and Ethnicity in Colorado 

Top cities and counties in Colorado

As of 2022, Colorado is divided into 64 counties. The most populous county in the State of Colorado is El Paso County and Las Animas County with an area of 4773 sq. mi. is the largest county by land area.

The largest city, and the capital of Colorado, is Denver with a population of 735,538. It’s followed by Colorado Springs at the second number and Aurora at the third. Colorado is one of the fastest-growing US states and has 12 cities with populations of over 100 thousand.

read more about Cities and counties in Colorado 

Colorado Population 2024 | Colorado Demographics