County Dossier

Gallatin County

Montana | County

Population

124,074

Land Area

2,605.4 sq mi

Context

Metro

Geography

County silhouette

Land Area
2,605.4 sq mi
Water Area
28.4 sq mi
Water Share
1.1%

Terrain Layer

Open the county terrain view inside the atlas flow.

Terra Firma

Population & Housing

Population

124,074

Density
47.6 / sq mi
Households
51,215
Housing Units
57,568
Median Age
34.2 years

Income & Economy

Median Household Income

$93,528

GDP

$11.88B

Real GDP Change+5.2%
Per Capita Income
$54,482
Personal Income
$12.01B
Personal Income Per Capita
$94,573

Classification

RUCC 3
Metro

Counties in metro areas of fewer than 250,000 population

Relief

Min

3,950 ft

Mean

6,280 ft

Max

10,625 ft

Provenance

GEOID 30031 ANSI 01720053
Latitude 45.51805 Longitude -111.16392
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