CDP in Jefferson County, Montana · 23.2 sq mi · 19 people per sq mi
About 440 people live in Jefferson City. The typical household earns $125,682, and the median resident is 55.2 years old.
2026 projection
From 596 in 2020
Poverty rate 0%
Men 55.3 · Women 38.3
2011–2026
440
2026 projection
26.2% since 2020 (decrease)
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.
2011–2026
440
2026 projection
26.2% since 2020 (decrease)
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 | 440 | -2 | 0.45% |
|---|---|---|---|
| 2025 | 442 | -4 | 0.45% |
| 2023 | 446 | -34 | 7.08% |
| 2022 | 480 | +42 | 9.59% |
| 2021 | 438 | -158 | 26.51% |
| 2020 | 596 | +15 | 2.58% |
| 2019 | 581 | +60 | 11.52% |
| 2018 | 521 | -133 | 20.34% |
| 2017 | 654 | -32 | 4.66% |
| 2016 | 686 | -29 | 4.06% |
Showing 10 of 15 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 5 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.
0% of residents
83% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 83% | 75% | 91% |
| Never married | 8% | 7% | 9% |
| Divorced | 10% | 19% | 0% |
| Widowed | 0% | 0% | 0% |
| Separated | 0% | 0% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau