Oskaloosa Flag

Oskaloosa

County:
Mahaska County
County Seat:
Yes
Area (mi²):
8.05
State:
Iowa

Oskaloosa is a city located in Mahaska County, Iowa. Oskaloosa has a 2026 population of 11,591. It is also the county seat of Mahaska County. Oskaloosa is currently growing at a rate of 0.07% annually and its population has increased by 0.42% since the most recent census, which recorded a population of 11,542 in 2020.

The median household income in Oskaloosa is $64,004 with a poverty rate of 16.6%. The median age in Oskaloosa is 37.6 years: 35.8 years for males, and 39.2 years for females. For every 100 females there are 98.0 males.

11.6K
Total Population
1,440
Density (mi²)
8 0.07%
Growth

Oskaloosa Population

Oskaloosa Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202611,59180.07%
202511,58380.07%
202411,575500.43%
202311,525400.35%
202211,485120.1%
202111,473-69-0.6%
202011,542-9-0.08%
201911,8111901.63%
201811,621-121-1.03%
201711,7421181.02%
201611,624-39-0.33%
201511,663400.34%
201411,623620.54%
201311,561250.22%
201211,536-36-0.31%
201111,572540.47%
201011,518550.48%
200010,9383062.88%
199010,632-357-3.25%
198010,989-235-2.09%
197011,2241711.55%
196011,053-71-0.64%
195011,1241000.91%
194011,0249018.9%
193010,1236967.38%
19209,427-39-0.41%
19109,4662542.76%
19009,2122,65440.47%
18906,5581,96042.63%
18804,5981,39443.51%
18703,20400%

Median Age

Overall: 37.6 years
Female: 39.2 years
Male: 35.8 years

Oskaloosa Adults

There are 8,983 adults, (2,347 of whom are seniors) in Oskaloosa.

Sex Ratio

Female: 5,811 (50.5%)
Male: 5,693 (49.5%)

Demographics

The racial composition of Oskaloosa includes 89.86% White, and smaller percentages for Black or African American, Asian, other race, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White10,33889.86%
Two or more races5294.6%
Black or African American2412.09%
Asian1891.64%
Other race1271.1%
Native Hawaiian or Pacific Islander630.55%
Native American170.15%
Race
Population ↓
Percentage (of total)
Other race1110.96%
Two or more races1090.95%
White460.4%
Black or African American460.4%
Native American130.11%
Race
Population ↓
Percentage (of total)
White10,29289.46%
Two or more races4203.65%
Black or African American1951.7%
Asian1891.64%
Native Hawaiian or Pacific Islander630.55%
Other race160.14%
Native American40.03%

Oskaloosa Marital Status

Economics and Income Statistics

Oskaloosa 's average per capita income is $43,605. Household income levels show a median of $64,004. The poverty rate stands at 16.6%.

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$99,602-
Families$86,006$101,237
Households$64,004$80,779
Non Families$36,520$44,536

$43,605

Average Income

$64,004

Median Household Income

16.6%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)