What is the population of Larimer County?

The population of Larimer County, CO is 360,428.

Where is Larimer County located?

Larimer County, CO is located at latitude 40.6664100 and longitude -105.4611600. It is in United States.

What is the area of Larimer County?

The area of Larimer County, CO is 6822 km².

What is the elevation of Larimer County?

Larimer County, CO has an elevation of 2165 meters (7103 feet) above sea level.

What time zone is Larimer County in?

Larimer County, CO is in the America/Denver time zone.

How has the population of Larimer County changed?

The population of Larimer County, CO has increased from 299,630 (2010) to 360,428 (2020), a change of 20.3%.

Larimer County, Colorado

Larimer County: county in Colorado, United States

About

Larimer County is a county located in the U.S. state of Colorado. As of the 2010 census, the population was 299,630 and a population density of 44 people per km². After 10 years in 2020 county had an estimated population of 360,428 inhabitants. Its county seat is Fort Collins. The county was created 165 years ago in 1860.

Larimer County locator map — Location of Larimer County on Colorado map.

County Snapshot

Larimer County at a glance

Larimer County currently has 7 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Colorado counties

Open related pages

Largest city

Fort Collins

Population 168,234

Quick Facts about Larimer County

Population	360,428 (2020)
Country	United States of America
State	Colorado (United States)
Twitter username	larimercounty
Area	6822 km²
Water as percent of area	1.4%
Land as percent of area	98.6%
Latitude & Longitude	40.6664,-105.4612
Named for	William Larimer, Jr.
Altitude	7,356 feet / 2242 meters
Capital	Fort Collins
Establishment	January 01, 1861
Time Zone	America/Denver
Local time	15:45:32 (14th April 2026)
Density	53 Pop. per km² as of 2020
Population growth	16.87% (2010-2020)
Weather	30℉ Snow Showers Likely 7-days weather

Larimer County Justice Center NE corner image

Geography

Larimer County is located at 40°39'59"N 105°27'40"W (40.6664100, -105.4611600). It has 5 neighbors: Albany County, Boulder County, Jackson County, Weld County and Laramie County.

Larimer County map

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The largest city of Larimer County is Fort Collins with a population of 168,234. Other cities include, Loveland population 83,517, Berthoud population 10,806, Wellington population 9,620 and Estes Park population 6,553. See all Larimer County cities & populated places.

Larimer County Populated Places

Cities, towns, neighborhoods & other populated places in Larimer County.

City Name	Population	Title
Fort Collins	168,234	The fifth most populous city in Colorado.
Loveland	83,517	The eighth most populous city in Colorado.
Berthoud	10,806	Town of the United States
Wellington	9,620	Town in Colorado, United States
Estes Park	6,553	Town in Larimer County, Colorado, United States
Timnath	3,193	Human settlement in Larimer County, Colorado, United States of America
Campion	1,839	Unincorporated community in Colorado

Weather

30°F

Snow Showers Likely

7 to 12 mph W Monday Night

Snow showers likely before 9pm, then rain and snow showers likely. Mostly cloudy, with a low around 30. New snow accumulation of less than one inch po...

7-Day Forecast

Official website of Larimer County

Official Website Twitter

Larimer County has 5 neighbours.

Albany County county in Wyoming, United States
Boulder County county in Colorado, United States
Jackson County county in Colorado, United States
Weld County county in Colorado, United States
Laramie County county in the southeastern corner of Wyoming, United States

Demographics

The population of Larimer County increased by 16.87% in 10 years.

Year	Population	% Change	Method
2010	299,630	-	census
2011	305,246	1.84%	estimation process
2012	310,842	1.8%	estimation process
2013	316,225	1.7%	estimation process
2014	324,008	2.4%	estimation process
2015	333,303	2.79%	estimation process
2016	338,984	1.68%	estimation process
2017	344,084	1.48%	estimation process
2018	350,660	1.88%	estimation process
2019	356,899	1.75%	estimation process
2020	360,428	0.98%	estimation process

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Colorado Other Counties (more counties)

County Name	Population	Title
Denver	735,538	The twentieth most populous city in the United States and the center of the Denver metropolitan area.
Denver County	735,538	County in Colorado, United States, coterminous with the City of Denver
El Paso County	728,310	One of the 64 counties in the U.
Arapahoe County	657,452	County in Colorado, United States
Jefferson County	583,283	County in Colorado, United States
Adams County	519,883	County in Colorado, United States
Colorado Springs	482,131	The second most populous city in Colorado and the center of the Colorado Springs metropolitan area.
Aurora	387,377	The third most populous city in Colorado and the center of the Denver metropolitan area.
Douglas County	360,750	County in Colorado, United States
Weld County	333,983	County in Colorado, United States
Boulder County	327,171	County in Colorado, United States
Pueblo County	169,823	County in Colorado, United States
Fort Collins	168,234	The fifth most populous city in Colorado.
Lakewood	157,429	The fifth most populous city in Colorado.
Mesa County	155,603	County in Colorado, United States
Thornton	148,113	The seventh most populous city in Colorado.