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 and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White32396.42%
Two or more races72.09%
Asian30.9%
Native American20.6%

Oak Grove Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

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)