City in Alamosa County, Colorado · 8 sq mi · 1,239 people per sq mi
9,871 people live in Alamosa. The typical household earns $49,688, and the median resident is 31.2 years old.
2026 projection
From 9,806 in 2020
Poverty rate 15.87%
Men 30.1 · Women 32
1880–2026
9,871
2026 projection
0.7% 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.
1880–2026
9,871
2026 projection
0.7% 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 | 9,871 | +22 | 0.22% |
|---|---|---|---|
| 2025 | 9,849 | -54 | 0.55% |
| 2024 | 9,903 | +4 | 0.04% |
| 2023 | 9,899 | +32 | 0.32% |
| 2022 | 9,867 | -31 | 0.31% |
| 2021 | 9,898 | +92 | 0.94% |
| 2020 | 9,806 | +29 | 0.30% |
| 2019 | 9,777 | +45 | 0.46% |
| 2018 | 9,732 | +131 | 1.36% |
| 2017 | 9,601 | +91 | 0.96% |
Showing 10 of 30 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.
Alamosa is growing slower than Alamosa 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 99 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 6 residents
32% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 32% | 29% | 35% |
| Never married | 45% | 52% | 36% |
| Divorced | 16% | 12% | 20% |
| Widowed | 6% | 3% | 9% |
| Separated | 2% | 3% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources