County Dossier

Lewis and Clark County

Montana | County

Population

73,464

Land Area

3,458.4 sq mi

Context

Metro

Geography

County silhouette

Land Area
3,458.4 sq mi
Water Area
39.2 sq mi
Water Share
1.1%

Terrain Layer

Open the county terrain view inside the atlas flow.

Terra Firma

Population & Housing

Population

73,464

Density
21.2 / sq mi
Households
31,215
Housing Units
34,082
Median Age
41.8 years

Income & Economy

Median Household Income

$78,237

GDP

$5.69B

Real GDP Change+4.0%
Per Capita Income
$44,837
Personal Income
$5.06B
Personal Income Per Capita
$67,391

Classification

RUCC 3
Metro

Counties in metro areas of fewer than 250,000 population

Relief

Min

3,423 ft

Mean

5,339 ft

Max

9,392 ft

Provenance

GEOID 30049 ANSI 00793926
Latitude 47.12211 Longitude -112.38289
Canonical 2025 Gazetteer ACS ACS 2020-2024 5-year BEA BEA county 2024 release (2026-02-05) BLS BLS LAUS 2024 annual average USDA USDA RUCC 2023 USGS USGS 3DEP published as of 2026-03-23