Johnstown, Colorado Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Johnstown, Colorado is 18,075 as of the 2023 American Community Survey, making it the 45th-largest city in Colorado. The median household income is $130,851, the median home value is $493,500, and the median age is 34.0.
The population has grown 107.2% since 2010 (9,960 → 20,639).
18,075
Population
1160
People / sq mi
$130,851
Median Income
$493,500
Median Home Value
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Johnstown covers 15.6 sq mi of land at 1160 people per square mile.
About Johnstown, CO
The poverty rate is what most separates Johnstown from the typical city: 0.0% of residents live below the federal poverty line, against 12.4% nationally. With 18,075 residents, Johnstown is a city in Colorado. It ranks #45 among cities in Colorado by population.
Households take in a median $130,851, comfortably above the US median of $78,538. Hardship is rare relative to US cities: a poverty rate of just 0.0%, below the national 12.4%. Home values run above average at $493,500, with typical rent around $1,767.
37.0% of adults 25 and older hold a bachelor’s degree, above the national average of 35.0%. About 15.0% of the workforce is home-based, above the national 14.0%, and the average commute runs about 29 minutes each way.
Johnstown town Population History (2010-2024)
The city of Johnstown town had a population of 9,960 in 2010 and 20,639 in 2024, a 2.1× growth over 14 years. The peak was 20,639 in 2024. Average annual growth rate: 5.39%.
20,639
Population (2024)
9,960
Population (2010)
20,639
Peak (2024)
5.39%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 9,960 |
| 2011 | 10,213 |
| 2012 | 10,641 |
| 2013 | 11,352 |
| 2014 | 12,227 |
| 2015 | 13,005 |
| 2016 | 13,470 |
| 2017 | 13,826 |
| 2018 | 14,106 |
| 2019 | 15,198 |
| 2020 | 17,367 |
| 2021 | 18,213 |
| 2022 | 18,618 |
| 2023 | 19,514 |
| 2024 | 20,639 |
Race & Ethnicity
| White | 80.7% |
| Black or African American | 0.5% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.6% |
| Two or More Races | 0.2% |
Economy & Income
$130,851
Median Household Income
$48,568
Per Capita Income
0.0%
Poverty Rate
3.3%
Unemployment Rate
Housing
$493,500
Median Home Value
$1,767
Median Rent
77.3%
Owner-Occupied
Education
94.8%
High School+
37.0%
Bachelor's+
Commute
0.0%
Drive Alone
74.3%
Public Transit
15.0%
Work From Home
29.0 min
Avg Commute
Community Profile
43.0%
Foreign Born
91.0%
Non-English at Home
8.2%
Veterans
8.3%
With Disability
95.2%
Health Insurance
98.4%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 18.1% |
| Manufacturing | 12.6% |
| Finance, Insurance & Real Estate | 11.1% |
| Construction | 9.4% |
| Retail Trade | 6.2% |
| Agriculture & Mining | 6.0% |
| Information | 5.9% |
| Arts, Entertainment & Food Services | 5.4% |
| Education, Health Care & Social Services | 3.1% |
| Public Administration | 3.0% |
| Transportation & Warehousing | 1.8% |
Largest cities in Colorado
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City rankings
Frequently Asked Questions
Johnstown, Colorado has a population of 18,075 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 45th-largest city in Colorado.
The median household income in Johnstown, Colorado is $130,851, with 0.0% of residents living below the federal poverty level.
The median home value in Johnstown, Colorado is $493,500, with median monthly rent at $1,767 and a homeownership rate of 77.3%.
The median age in Johnstown, Colorado is 34.0 years. The population is 54.0% male and 46.0% female.
The population has grown 107.2% since 2010 (9,960 → 20,639).
Johnstown town, CO Climate
Johnstown town, CO has an average annual temperature of 9.6°C (49°F) and receives about 384 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.6°C
Avg Temp
384
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -3° / 26° | 11 mm |
| February | 0° / 33° | 10 mm |
| March | 5° / 40° | 34 mm |
| April | 9° / 48° | 45 mm |
| May | 14° / 58° | 66 mm |
| June | 20° / 67° | 49 mm |
| July | 22° / 72° | 43 mm |
| August | 21° / 70° | 34 mm |
| September | 16° / 61° | 35 mm |
| October | 10° / 50° | 24 mm |
| November | 3° / 37° | 21 mm |
| December | -2° / 28° | 12 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Johnstown town, CO
The most comfortable months to visit Johnstown town, CO are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 31°C high). The coldest is January (near -11°C low). May is usually the wettest month.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.