Larimer County, Colorado Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 7th-largest in Colorado
The population of Larimer County, Colorado is 363,561 as of the 2023 American Community Survey, making it the 7th-largest county in Colorado. The median household income is $91,364, the median home value is $532,200, and the median age is 36.6.
The population of Larimer County has grown 24.7% since 2010 (300,453 → 374,574), a +1.59% annualized rate.
363,561
Population
+1.59%
Annual growth
140
People / sq mi
$91,364
Median Income
$532,200
Median Home Value
Larimer County covers 2,596 sq mi of land at 140.1 people per square mile.
About Larimer County, CO
Educational attainment is the headline number in Larimer County: 51.7% of adults 25 and older have a four-year degree. Larimer County is a county in Colorado with a population of 363,561. That makes it one of the ten largest counties in Colorado in the country, at #7 by population.
Income is a real outlier — the median household pulls in $91,364, putting Larimer County near the top of US counties. Poverty is among the lowest of comparable US counties, at 4.6% — below the national 12.4%. Housing is expensive: the median home is worth $532,200, with typical rent around $1,677.
The population is unusually well-credentialed for US counties — 51.7% of adults have a four-year degree, above the national 35.0%. An unusually large 18.9% of workers are remote, above the national 14.0%, and the average commute runs about 23 minutes each way.
The education numbers are the throughline: a college-heavy population in Larimer County usually coincides with higher incomes and a workforce concentrated in professional and information industries.
Larimer County Population History (2010-2024)
The county of Larimer County had a population of 300,453 in 2010 and 374,574 in 2024, a 24.7% growth over 14 years. The peak was 374,574 in 2024. Average annual growth rate: 1.59%.
374,574
Population (2024)
300,453
Population (2010)
374,574
Peak (2024)
1.59%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 300,453 |
| 2011 | 305,320 |
| 2012 | 310,983 |
| 2013 | 316,426 |
| 2014 | 324,272 |
| 2015 | 333,637 |
| 2016 | 339,394 |
| 2017 | 344,509 |
| 2018 | 351,045 |
| 2019 | 357,241 |
| 2020 | 359,932 |
| 2021 | 362,785 |
| 2022 | 368,017 |
| 2023 | 371,530 |
| 2024 | 374,574 |
Race & Ethnicity
| White | 84.1% |
| Black or African American | 1.0% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 2.0% |
| Two or More Races | 0.1% |
Age & Sex
36.6
Median Age
50.0%
Female
50.0%
Male
16.8%
Age 65+
Age Distribution
Children (under 15): 15.2% · Seniors (65+): 16.8%
Income & Poverty
| Median household income | $91,364$-1,106 vs state |
| Mean household income | $118,812 |
| Per-capita income | $49,323 |
| Poverty rate | 4.6%-1.3% vs state |
| Unemployment rate | 3.0% |
| Employment-to-population | 64.0% |
Top Industries by Employment
The largest employment sector in Larimer County is professional & business services, accounting for 24.8% of workers.
How residents commute
0.9%
Drive alone
2.8%
Carpool
68.4%
Public transit
18.9%
Work from home
23.3 min
Avg commute
Housing
$532,200+$30,000 vs state
Median home value
$1,677
Median rent
64.3%
Homeownership rate
161,882
Total housing units
93.6%
Occupied
6.4%
Vacant
35.7%
Renter-occupied
Social & access
94.3%
With health insurance
98.0%
With broadband internet
54.4%
Foreign-born
6.3%
Veterans (18+)
10.3%
With a disability
91.7%
Speak language other than English at home
Education
96.6%
High School+
51.7%
Bachelor's+
Largest cities in Colorado
Other counties in Colorado
Part of Colorado
Metro areas in Colorado
County rankings
Frequently Asked Questions
Larimer County, Colorado has a population of 363,561 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 7th-largest county in Colorado. Population density is 140 people per square mile.
The population of Larimer County has grown 24.7% since 2010 (300,453 → 374,574), a +1.59% annualized rate.
The median household income in Larimer County, Colorado is $91,364, with mean (average) household income of $118,812 and per-capita income of $49,323. 4.6% of residents live below the federal poverty level.
In Larimer County, the largest racial and ethnic groups are White (84.1%), Hispanic or Latino (2.0%), Black or African American (1.0%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Larimer County, Colorado is 36.6 years. Residents are 50.0% female and 50.0% male.
The median home value in Larimer County is $532,200 and median monthly rent is $1,677. 64.3% of occupied housing units are owner-occupied. The county has 161,882 total housing units, 6.4% of which are vacant.
The largest employment sector in Larimer County, Colorado is professional, scientific, and management services, employing 24.8% of workers. The unemployment rate is 3.0%.
Denver is among the largest cities associated with Larimer County, Colorado, with a population of 713,734.
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Statewide data for Colorado
Population, race, income, age, and trends across Colorado
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.