Data / Rankings / Population / Cities in Colorado

Cities in Colorado by population, 2025

Denver, CO had the highest population of 54 cities in 2025, at 740,613. Glenwood Springs, CO had the lowest, at 10,395. The median was 29,783 and the figure for Colorado was 6.01 million. Source: the U.S. Census Bureau.

Highest740,613Denver, CO
Lowest10,395Glenwood Springs, CO
Median29,78354 cities
Colorado6,012,561History

All cities, 2025

Denver, CO: 740,613 personsDenver, CO740,613Colorado Springs, CO: 494,743 personsColorado Springs, CO494,743Aurora, CO: 410,053 personsAurora, CO410,053Fort Collins, CO: 171,500 personsFort Collins, CO171,500Lakewood, CO: 156,927 personsLakewood, CO156,927Thornton, CO: 147,766 personsThornton, CO147,766Arvada, CO: 122,901 personsArvada, CO122,901Westminster, CO: 116,182 personsWestminster, CO116,182Greeley, CO: 115,073 personsGreeley, CO115,073Pueblo, CO: 110,404 personsPueblo, CO110,404Centennial, CO: 108,658 personsCentennial, CO108,658Boulder, CO: 105,689 personsBoulder, CO105,689Longmont, CO: 100,109 personsLongmont, CO100,109Castle Rock, CO: 83,815 personsCastle Rock, CO83,815Loveland, CO: 81,387 personsLoveland, CO81,387Broomfield, CO: 79,174 personsBroomfield, CO79,174Commerce City, CO: 72,345 personsCommerce City, CO72,345Grand Junction, CO: 71,827 personsGrand Junction, CO71,827Parker, CO: 65,985 personsParker, CO65,985Littleton, CO: 46,246 personsLittleton, CO46,246Brighton, CO: 45,395 personsBrighton, CO45,395Windsor, CO: 43,840 personsWindsor, CO43,840Erie, CO: 40,904 personsErie, CO40,904Northglenn, CO: 38,893 personsNorthglenn, CO38,893Englewood, CO: 35,305 personsEnglewood, CO35,305Wheat Ridge, CO: 32,081 personsWheat Ridge, CO32,081Lafayette, CO: 30,116 personsLafayette, CO30,116Fountain, CO: 29,450 personsFountain, CO29,450Evans, CO: 22,500 personsEvans, CO22,500Johnstown, CO: 22,433 personsJohnstown, CO22,433Montrose, CO: 21,583 personsMontrose, CO21,583Louisville, CO: 20,581 personsLouisville, CO20,581Golden, CO: 20,390 personsGolden, CO20,390Firestone, CO: 20,129 personsFirestone, CO20,129Durango, CO: 19,733 personsDurango, CO19,733Frederick, CO: 18,241 personsFrederick, CO18,241Cañon City, CO: 17,030 personsCañon City, CO17,030Castle Pines, CO: 15,583 personsCastle Pines, CO15,583Greenwood Village, CO: 15,323 personsGreenwood Village, CO15,323Lone Tree, CO: 15,278 personsLone Tree, CO15,278Berthoud, CO: 14,080 personsBerthoud, CO14,080Federal Heights, CO: 14,075 personsFederal Heights, CO14,075Fruita, CO: 14,003 personsFruita, CO14,003Monument, CO: 13,813 personsMonument, CO13,813Superior, CO: 13,637 personsSuperior, CO13,637Steamboat Springs, CO: 13,557 personsSteamboat Springs, CO13,557Sterling, CO: 13,054 personsSterling, CO13,054Wellington, CO: 12,169 personsWellington, CO12,169Fort Morgan, CO: 11,841 personsFort Morgan, CO11,841Severance, CO: 11,841 personsSeverance, CO11,841Timnath, CO: 11,600 personsTimnath, CO11,600Rifle, CO: 10,844 personsRifle, CO10,844Fort Lupton, CO: 10,402 personsFort Lupton, CO10,402Glenwood Springs, CO: 10,395 personsGlenwood Springs, CO10,395
persons. Source: U.S. Census Bureau, Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). Retrieved 2026-10-12.

Full ranking

RankCities2025
persons		Change on 2024
1Denver, CO740,613-0.1%
2Colorado Springs, CO494,743+0.5%
3Aurora, CO410,053+0.4%
4Fort Collins, CO171,500+0.5%
5Lakewood, CO156,927-0.3%
6Thornton, CO147,766-0.4%
7Arvada, CO122,901+0.5%
8Westminster, CO116,182-0.1%
9Greeley, CO115,073+0.3%
10Pueblo, CO110,404-0.8%
11Centennial, CO108,658-1.1%
12Boulder, CO105,689-0.8%
13Longmont, CO100,109+0.5%
14Castle Rock, CO83,815+1%
15Loveland, CO81,387+0.5%
16Broomfield, CO79,174+1%
17Commerce City, CO72,345+1.8%
18Grand Junction, CO71,827+1.8%
19Parker, CO65,985+1.2%
20Littleton, CO46,246+1.8%
21Brighton, CO45,395+3.2%
22Windsor, CO43,840+4.7%
23Erie, CO40,904+5.8%
24Northglenn, CO38,893+0.4%
25Englewood, CO35,305-1.1%
26Wheat Ridge, CO32,081-0%
27Lafayette, CO30,116-1.3%
28Fountain, CO29,450+0.1%
29Evans, CO22,500-0%
30Johnstown, CO22,433+8.4%
31Montrose, CO21,583-0.1%
32Louisville, CO20,581-0.8%
33Golden, CO20,390+0.9%
34Firestone, CO20,129+3.5%
35Durango, CO19,733-0.6%
36Frederick, CO18,241+1.3%
37Cañon City, CO17,030-0.5%
38Castle Pines, CO15,583+3.2%
39Greenwood Village, CO15,323-1%
40Lone Tree, CO15,278+8.9%
41Berthoud, CO14,080+3.3%
42Federal Heights, CO14,075-0.5%
43Fruita, CO14,003+0.5%
44Monument, CO13,813+3.3%
45Superior, CO13,637+0.6%
46Steamboat Springs, CO13,557-1.4%
47Sterling, CO13,054-0%
48Wellington, CO12,169+0.5%
49Fort Morgan, CO11,841+0.1%
49Severance, CO11,841+2%
51Timnath, CO11,600+7.2%
52Rifle, CO10,844+0.8%
53Fort Lupton, CO10,402+4.3%
54Glenwood Springs, CO10,395-0.3%

Other periods

About this ranking

Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). Norway: Statistics Norway, 1 January. United States: Census Bureau population estimates for 1 July. United Kingdom regions and local authorities: Office for National Statistics estimates for 30 June. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.

The World Bank series exists for every country, so use it (through compare) to rank countries on one basis.

Every value in the ranking comes from the same publisher and the same period, so the cities are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-12.

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Rank Cities in Colorado by population using official data, and cite the source.
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Questions

Which city has the highest population?

Denver, CO, with 740,613 in 2025, according to the U.S. Census Bureau.

Which city has the lowest population?

Glenwood Springs, CO, with 10,395 in 2025.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Annual estimates of the resident population for incorporated places, 1 July (Population Estimates Program, subcounty totals). Retrieved 2026-10-12.

Population: other rankings