Overview
- District ID
- mt-sd-031
- State
- Montana
- Chamber
- Upper chamber (state senate)
- District Code
- 031
- Land Area
- 14.3 sq mi
- Water Area
- 0.07 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
| County | Overlap | Share of district land | Share of county land |
|---|
| Gallatin County | 14.29 sq mi | 100.0% | 0.5% |
Showing all 1 county
Places
Showing all 3 places
Overlapping Congressional Districts
| Congressional district | Population in both | Share of this district's population | Share of the congressional district's population | Share of this district's land |
|---|
| MT District 1 | 21,600 | 100.0% | 4.0% | 100.0% |
Source: U.S. Census Bureau 2020 blocks and 2025 block equivalency files (119th Congress, 2024 state legislative plans).
Voters
- Registered Voters
- 14,167
- Active Voters
- 10,975 (77.5%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2023–2024 | 9,744 (68.8%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 9,520 (67.2%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 8,691 (61.3%) | 0 (0.0%) | 0 (0.0%) |
| 2017–2018 | 6,381 (45.0%) | 0 (0.0%) | 0 (0.0%) |
| 2015–2016 | 5,198 (36.7%) | 0 (0.0%) | 0 (0.0%) |
| 2013–2014 | 4,069 (28.7%) | 0 (0.0%) | 0 (0.0%) |
| 2011–2012 | 3,654 (25.8%) | 0 (0.0%) | 0 (0.0%) |
Turnout counts today's registered voters with a counted ballot in the cycle's elections (the odd and even year), as a share of today's registered voters. Voters who have since left the rolls are not counted.
Browse the voter list for this district (premium access; sign-in required)
Source: Civitech voter file snapshot as of 09/10/2025. These are registered voters, separate from the Census population figures. Counts under 10 are suppressed and shown as "<10".
Demographics
- Total Population
- 21,620 (± 1,409)
- Median Age
- 24.5
- Median Household Income
- $78,366 (± $3,975)
- High School Graduate or Higher (age 25+)
- 98.0%
- Bachelor's Degree or Higher (age 25+)
- 58.6%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 2,905 | 13.4% |
| 18 to 64 | 16,894 | 78.1% |
| 65 and over | 1,821 | 8.4% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 1,493 | 6.9% |
| White, not Hispanic | 18,065 | 83.6% |
| Black, not Hispanic | 306 | 1.4% |
| Asian, not Hispanic | 593 | 2.7% |
| American Indian / Alaska Native, not Hispanic | 149 | 0.7% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 155 | 0.7% |
| Two or more races, not Hispanic | 859 | 4.0% |
Source: U.S. Census Bureau, American Community Survey 2020-2024 ACS 5-year estimates (tables B01001, B01002, B01003, B03002, B15003, B19013) for this state legislative district. Estimates are survey-based; ± figures are 90% margins of error.
Citizen Voting Age Population
- Total Citizen Population
- 20,831
- Citizen Voting Age Population (CVAP)
- 17,991
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 19,480 | 93.5% |
| Hispanic | 1,351 | 6.5% |
| White | 18,424 | 88.4% |
| Black | 223 | 1.1% |
| Asian | 281 | 1.3% |
| American Indian / Alaska Native | 152 | 0.7% |
| Native Hawaiian / Pacific Islander | 2 | 0.0% |
| Two or More Races | 30 | 0.1% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 17,043 | 94.7% |
| Hispanic | 952 | 5.3% |
| White | 16,239 | 90.3% |
| Black | 160 | 0.9% |
| Asian | 328 | 1.8% |
| American Indian / Alaska Native | 328 | 1.8% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 14 | 0.1% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
