Gallatin County, MT — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
122,194
Male
63,955
52.3%
Female
58,239
47.7%
Median Age
33.8 yrs
Avg Household Size
2.4
Foreign Born
4.1%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher34.4%
High School or Higher46.2%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
4.4%
Disability
0.0%
Non-English Home
1.8%
Married
41.7%
Gallatin County, MT has a population of 122,194 according to 2023 Census Bureau estimates. The median age is 33.8 years. The largest racial or ethnic group is White at 89.7% of the population. 34.4% of residents hold a bachelor's degree or higher. 4.1% of residents are foreign-born.