Yellowstone County Flag

Yellowstone County

State:
Montana
County Seat:
Billings

Yellowstone County's estimated 2025 population is 172,789 with a growth rate of 0.57% in the past year according to the most recent United States census data. Yellowstone County is the 1st largest county in Montana. The 2010 population was 148,405 and has seen a growth of 16.43% since that time.

172,789
Total Population
66
Population Density (mi²)
1
Population Rank (State)
973 0.57%
Annual Population Growth

Yellowstone County Population

Yellowstone County Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Yellowstone County includes 86.77% White, 4% Native American, and smaller percentages for other race, Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Native American

Other race

Black or African American

Asian

Native Hawaiian or Pacific Islander

Race
Population
Percentage (of total)
White145,20486.77%
Two or more races9,7815.84%
Native American6,6944%
Other race2,7391.64%
Black or African American1,4660.88%
Asian1,3800.82%
Native Hawaiian or Pacific Islander760.05%

Yellowstone County Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Yellowstone County's average per capita income is $47,924. Household income levels show a median of $74,400. The poverty rate stands at 10.23%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$109,602$142,312
Families$94,167$123,455
Households$74,400$102,308
Non Families$45,452$63,281

$47,924

Average Income

$74,400

Median Household Income

10.23%

Poverty Rate