Town in Weld County, Colorado · 15.4 sq mi · 1,507 people per sq mi
23,265 people live in Johnstown. The typical household earns $128,995, and the median resident is 34.9 years old.
2026 projection
From 17,303 in 2020
Poverty rate 3.67%
Men 35 · Women 34.6
1910–2026
23,265
2026 projection
34.5% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1910–2026
23,265
2026 projection
34.5% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 23,265 | +832 | 3.71% |
|---|---|---|---|
| 2025 | 22,433 | +1,736 | 8.39% |
| 2024 | 20,697 | +1,164 | 5.96% |
| 2023 | 19,533 | +909 | 4.88% |
| 2022 | 18,624 | +413 | 2.27% |
| 2021 | 18,211 | +908 | 5.25% |
| 2020 | 17,303 | +394 | 2.33% |
| 2019 | 16,909 | +1,418 | 9.15% |
| 2018 | 15,491 | +652 | 4.39% |
| 2017 | 14,839 | +507 | 3.54% |
Showing 10 of 27 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
Johnstown is growing faster than Weld County, Colorado, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 189 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 27 residents
61% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 61% | 62% | 60% |
| Never married | 27% | 29% | 24% |
| Divorced | 7% | 6% | 9% |
| Widowed | 3% | 2% | 6% |
| Separated | 1% | <1% | 2% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources