Overview
- District ID
- mt-sd-018
- State
- Montana
- Chamber
- Upper chamber (state senate)
- District Code
- 018
- Land Area
- 12,495.5 sq mi
- Water Area
- 214.7 sq mi
Boundary
Boundary as GeoJSON
Source: U.S. Census Bureau TIGER/Line state legislative district boundaries.
Counties
Showing all 6 counties
Places
Showing all 11 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 2 | 21,668 | 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
- 13,974
- Active Voters
- 12,308 (88.1%)
Party Registration
This state's voter file does not record party registration.
Turnout by Cycle
| Cycle | General | Democratic Primary | Republican Primary |
|---|
| 2023–2024 | 11,358 (81.3%) | 0 (0.0%) | 0 (0.0%) |
| 2021–2022 | 10,487 (75.0%) | 0 (0.0%) | 0 (0.0%) |
| 2019–2020 | 10,969 (78.5%) | 0 (0.0%) | 0 (0.0%) |
| 2017–2018 | 9,216 (66.0%) | 0 (0.0%) | 0 (0.0%) |
| 2015–2016 | 8,406 (60.2%) | 0 (0.0%) | 0 (0.0%) |
| 2013–2014 | 6,551 (46.9%) | 0 (0.0%) | 0 (0.0%) |
| 2011–2012 | 7,134 (51.1%) | 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
- 21,647 (± 777)
- Median Age
- 43.2
- Median Household Income
- $70,567 (± $4,435)
- High School Graduate or Higher (age 25+)
- 94.8%
- Bachelor's Degree or Higher (age 25+)
- 25.3%
Population by Age
| Group | People | Share |
|---|
| Under 18 | 4,762 | 22.0% |
| 18 to 64 | 12,211 | 56.4% |
| 65 and over | 4,674 | 21.6% |
Population by Race and Hispanic Origin
| Group | People | Share |
|---|
| Hispanic or Latino (any race) | 772 | 3.6% |
| White, not Hispanic | 18,812 | 86.9% |
| Black, not Hispanic | 4 | 0.0% |
| Asian, not Hispanic | 174 | 0.8% |
| American Indian / Alaska Native, not Hispanic | 751 | 3.5% |
| Native Hawaiian / Pacific Islander, not Hispanic | 0 | 0.0% |
| Some other race, not Hispanic | 93 | 0.4% |
| Two or more races, not Hispanic | 1,041 | 4.8% |
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
- 21,471
- Citizen Voting Age Population (CVAP)
- 16,720
Citizen Population by Race/Ethnicity
| Group | Citizens | Share |
|---|
| Non-Hispanic | 20,762 | 96.7% |
| Hispanic | 707 | 3.3% |
| White | 19,270 | 89.7% |
| Black | 4 | 0.0% |
| Asian | 116 | 0.5% |
| American Indian / Alaska Native | 748 | 3.5% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 38 | 0.2% |
Citizen Voting Age Population by Race/Ethnicity
| Group | CVAP | Share |
|---|
| Non-Hispanic | 16,299 | 97.5% |
| Hispanic | 422 | 2.5% |
| White | 15,304 | 91.5% |
| Black | 45 | 0.3% |
| Asian | 125 | 0.7% |
| American Indian / Alaska Native | 824 | 4.9% |
| Native Hawaiian / Pacific Islander | 0 | 0.0% |
| Two or More Races | 7 | 0.0% |
Source: Redistricting Data Hub / U.S. Census Bureau CVAP Special Tabulation (2020-2024 ACS 5-year).
