Lewis and Clark County, Montana
Lewis and Clark County, Montana · ZIP 59410, 59601, 59602
- Census data · ACS 2019-2023
- 75,129 (2024 estimate)Population
- 30,655Households
- $74,543Median household income
- $358,200Median home value
- 18Towns with a page
- 11ZIP codes
Lewis and Clark County in numbersOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 55,716 |
| 2010 | 63,395 |
| 2020 | 70,973 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, county level, state 30, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 30, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 30, retrieved November 14, 2026.
Median household income $74,543 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county level, state 30, retrieved November 14, 2026.
- Owner occupied
- 21,363 units
- Renter occupied
- 9,292 units
- Vacancy rate
- 9.4%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, county level, state 30, retrieved November 14, 2026.
27,265 employees in 2,603 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.
Source: County Business Patterns 2023: employment by sector, county level, state 30, retrieved November 14, 2026.
| Measure | Lewis and Clark County | Montana |
|---|---|---|
| Population | 72,580 | 1,105,072 |
| Median household income | $74,543 | $69,922 |
| Median age | 41.3 | 40.2 |
| Median home value | $358,200 | $338,100 |
| Bachelor’s degree or higher | 42.8% | 34.5% |
| Foreign-born residents | 1.9% | 2.3% |
| Owner-occupied homes | 69.7% | 69.4% |
| Mean commute to work | 17.5 minutes | 19.2 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county level, state 30, retrieved November 14, 2026.
Townships, towns and villages in Lewis and Clark County18 with a page · sort by any column
| Type | |||
|---|---|---|---|
| Helena | City | 34,729 | 17.3 sq mi |
| Helena Valley Southeast | Census designated place | 9,533 | 21.5 sq mi |
| Helena Valley West Central | Census designated place | 8,224 | 26.4 sq mi |
| Helena Valley Northwest | Census designated place | 5,070 | 16.4 sq mi |
| Helena Valley Northeast | Census designated place | 4,398 | 53.2 sq mi |
| East Helena | City | 2,239 | 4.05 sq mi |
| Helena West Side | Census designated place | 1,584 | 15.0 sq mi |
| Lincoln | Census designated place | 868 | 17.5 sq mi |
| Unionville | Census designated place | 386 | 1.28 sq mi |
| Augusta | Census designated place | 222 | 0.92 sq mi |
| York | Census designated place | 215 | 0.33 sq mi |
| Marysville | Census designated place | 97 | 0.50 sq mi |
| Rimini | Census designated place | 93 | 0.30 sq mi |
| Craig | Census designated place | 47 | 0.30 sq mi |
| Canyon Creek | Census designated place | 28 | 0.73 sq mi |
| Wolf Creek | Census designated place | 18 | 0.21 sq mi |
| Gilman | Census designated place | 17 | 0.65 sq mi |
| Milford Colony | Census designated place | 0 | 0.44 sq mi |
Populations: Census Population Estimates, Vintage 2024: subcounty totals, state 30 (2024). Land areas: Census Gazetteer 2025: counties. A dash means the figure is not in the cited file.
County officialsFrom public records
No county official is published yet. Names appear once a researcher drafts them from the county’s own site and a second person approves; office contacts only, never personal details.
Across Lewis and Clark County
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Neighboring counties
Neighboring counties
- Broadwater CountyPopulation 8,302 (2024 estimate)
- Cascade CountyPopulation 84,523 (2024 estimate)
- Flathead CountyPopulation 114,527 (2024 estimate)
- Jefferson CountyPopulation 13,304 (2024 estimate)
- Meagher CountyPopulation 2,065 (2024 estimate)
- Powell CountyPopulation 7,120 (2024 estimate)
- Teton CountyPopulation 6,444 (2024 estimate)
Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 30, retrieved November 14, 2026.