Thief River Falls

County:: Pennington County
County Seat:: Yes
Area (mi²):: 6.003
State:: Minnesota

Thief River Falls is a city located in Pennington County, Minnesota. Thief River Falls has a 2025 population of 8,811. It is also the county seat of Pennington County. Thief River Falls is currently declining at a rate of -0.06% annually and its population has decreased by -0.28% since the most recent census, which recorded a population of 8,836 in 2020.

The average household income in Thief River Falls is $84,261 with a poverty rate of 11.31%.The median age in Thief River Falls is 38.9 years: 37.2 years for males, and 41.8 years for females.

Demographics

The racial composition of Thief River Falls includes 90.58% White, and smaller percentages for other race, Black or African American, Asian, Native American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	8,008	90.58%
Two or more races	411	4.65%
Other race	168	1.9%
Black or African American	155	1.75%
Asian	59	0.67%
Native American	40	0.45%

Thief River Falls Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Thief River Falls' average per capita income is $49,480. Household income levels show a median of $65,244. The poverty rate stands at 11.31%.

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	$106,775	-
Families	$94,388	$111,783
Households	$65,244	$84,261
Non Families	$46,612	$53,401

$49,480

Average Income

$65,244

Median Household Income

11.31%

Poverty Rate