Oak Grove Flag

Oak Grove

County:
Mercer County
County Seat:
No
Area (mi²):
0.658
State:
Illinois

Oak Grove is a village located in Mercer County, Illinois. Oak Grove has a 2025 population of 460. Oak Grove is currently declining at a rate of -0.43% annually and its population has decreased by -1.92% since the most recent census, which recorded a population of 469 in 2020.

The average household income in Oak Grove is $62,873 with a poverty rate of 18.21%. The median age in Oak Grove is 48.6 years: 48.6 years for males, and 45.5 years for females.

460
Total Population
699
Density (mi²)
-2 -0.43%
Growth

Oak Grove Population

Oak Grove Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Oak Grove includes 96.42% White, and smaller percentages for Two or more races, Asian, Native American, Black or African American, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Asian

Native American

Black or African American

Native Hawaiian or Pacific Islander

Other race

Race
Population
Percentage (of total)
White32396.42%
Two or more races72.09%
Asian30.9%
Native American20.6%
Black or African American00%
Native Hawaiian or Pacific Islander00%
Other race00%

Oak Grove Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Oak Grove's average per capita income is $37,083. Household income levels show a median of $41,912. The poverty rate stands at 18.21%.

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$73,889-
Households$41,912$62,873
Families$41,833$67,478
Non Families$32,500$48,824

$37,083

Average Income

$41,912

Median Household Income

18.21%

Poverty Rate

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)