Lewis and Clark County, MT — Demographics & Population
Population, age distribution, race & ethnicity, and education data
Population Overview
Source: Census Bureau ACS (2023)Total Population
72,580
Male
36,100
49.7%
Female
36,480
50.3%
Median Age
41.3 yrs
Avg Household Size
2.3
Foreign Born
1.9%
Race & Ethnicity
Source: Census Bureau ACS (2023)Age Distribution
Source: Census Bureau ACS (2023)Education
Source: Census Bureau ACS (2023)Bachelor's or Higher30.4%
High School or Higher47.1%
Other Demographics
Source: Census Bureau ACS (2023)Veterans
8.1%
Disability
0.0%
Non-English Home
3.7%
Married
43.0%
Lewis and Clark County, MT has a population of 72,580 according to 2023 Census Bureau estimates. The median age is 41.3 years. The largest racial or ethnic group is White at 91.5% of the population. 30.4% of residents hold a bachelor's degree or higher. 1.9% of residents are foreign-born.