US Census Data

Lewis and Clark County vs Yellowstone County

A side-by-side comparison of Lewis and Clark County and Yellowstone County: population, income, housing, and more.

Lewis and Clark County and Yellowstone County are counties in Montana. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Yellowstone County has the higher population (167,340 vs 72,580 in Lewis and Clark County). Lewis and Clark County has the higher median household income ($74,543 vs $74,400 in Yellowstone County). Lewis and Clark County has the higher median home value ($358,200 vs $317,600 in Yellowstone County).

Population, income & housing

Lewis and Clark CountyYellowstone County
Population72,580167,340
Median age41.3 yrs38.7 yrs
Median household income$74,543$74,400
Median home value$358,200$317,600
Median gross rent$1,062$1,084
Housing units33,83773,363
Homeownership rate69.7%69.3%
Bachelor's degree or higher42.8%33.9%
Unemployment rate3.5%3.4%

Trends (ACS 5-year, 2019–2023)

Lewis and Clark CountyYellowstone County
Population67,805 → 72,580 (+7.0%)159,008 → 167,340 (+5.2%)
Median household income$65,791 → $74,543 (+13.3%)$61,264 → $74,400 (+21.4%)
Median home value$243,000 → $358,200 (+47.4%)$226,000 → $317,600 (+40.5%)
Median gross rent$833 → $1,062 (+27.5%)$892 → $1,084 (+21.5%)

Lewis and Clark County

Population
67,80572,580
Median household income
$65,791$74,543
Median home value
$243,000$358,200
Median gross rent
$833$1,062

Yellowstone County

Population
159,008167,340
Median household income
$61,264$74,400
Median home value
$226,000$317,600
Median gross rent
$892$1,084

Age & race/ethnicity

Age distribution (share)

Lewis and Clark CountyYellowstone County
Under 55.4%5.7%
5 to 1716.0%17.5%
18 to 247.6%7.9%
25 to 3412.1%13.8%
35 to 4413.2%13.4%
45 to 5411.7%11.3%
55 to 6414.1%12.5%
65 to 7412.6%10.6%
75 and over7.3%7.2%

Race & ethnicity (share)

Lewis and Clark CountyYellowstone County
White (non-Hispanic)89.2%83.9%
Black or African American0.6%0.5%
American Indian & Alaska Native0.9%3.8%
Asian0.6%0.8%
Native Hawaiian & Pacific Islander0.0%0.0%
Some other race0.3%0.6%
Two or more races4.5%4.0%
Hispanic or Latino3.9%6.4%

Educational attainment (age 25+)

Share of adults 25+

Lewis and Clark CountyYellowstone County
No high school diploma5.1%4.7%
High school graduate23.5%29.6%
Some college or associate's28.5%31.7%
Bachelor's degree27.9%23.3%
Graduate or professional degree15.0%10.7%

Commute to work

How workers get to work (share)

Lewis and Clark CountyYellowstone County
Drove alone69.2%77.9%
Carpooled10.7%9.7%
Public transit0.2%0.9%
Walked4.8%2.0%
Bicycle0.9%0.5%
Worked from home12.9%8.0%
Other means1.4%0.9%

Housing

Units in structure (share)

Lewis and Clark CountyYellowstone County
1-unit, detached66.3%65.5%
1-unit, attached3.7%5.7%
2 to 4 units11.6%7.5%
5 to 19 units4.3%5.9%
20 or more units4.2%5.2%
Mobile home & other9.9%10.0%

Poverty & households

Lewis and Clark CountyYellowstone County
Poverty rate8.7%10.2%
Average household size2.312.37
Mean commute (minutes)1819
Median year structure built19821982

Full profiles

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