City in Jefferson County, Montana · 1.1 sq mi · 1,181 people per sq mi
About 1,300 people live in Boulder. The typical household earns $72,500, and the median resident is 41.4 years old.
2026 projection
From 1,205 in 2020
Poverty rate 3.76%
Men 43.2 · Women 41
2010–2026
1,328
2026 projection
10.2% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2010–2026
1,328
2026 projection
10.2% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 1,328 | +23 | 1.76% |
|---|---|---|---|
| 2025 | 1,305 | +6 | 0.46% |
| 2024 | 1,299 | +14 | 1.09% |
| 2023 | 1,285 | +15 | 1.18% |
| 2022 | 1,270 | +38 | 3.08% |
| 2021 | 1,232 | +27 | 2.24% |
| 2020 | 1,205 | -71 | 5.56% |
| 2019 | 1,276 | +13 | 1.03% |
| 2018 | 1,263 | +15 | 1.20% |
| 2017 | 1,248 | +14 | 1.13% |
Showing 10 of 17 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 13 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
55% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 55% | 50% | 62% |
| Never married | 27% | 34% | 17% |
| Divorced | 12% | 13% | 10% |
| Widowed | 3% | 0% | 8% |
| Separated | 3% | 3% | 3% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau