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 2026 population of 469. Oak Grove is currently declining at a rate of 0% annually and its population has decreased by -0.42% since the most recent census, which recorded a population of 471 in 2020.

The median household income in Oak Grove is $40,972 with a poverty rate of 25.99%. The median age in Oak Grove is 58.8 years: 56.6 years for males, and 62.1 years for females. For every 100 females there are 145.1 males.

469
Total Population
713
Density (mi²)

Oak Grove Population

Oak Grove Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202646900%
2025469-1-0.21%
202447040.86%
202346600%
2022466-2-0.43%
2021468-3-0.64%
2020471-1-0.21%
2019586-1-0.17%
2018587-3-0.51%
2017590-2-0.34%
2016592-1-0.17%
2015593-3-0.5%
201459610.17%
2013595-1-0.17%
201259600%
201159620050.51%
201059500%

Median Age

Overall: 58.8 years
Female: 62.1 years
Male: 56.6 years

Oak Grove Adults

There are 251 adults, (84 of whom are seniors) in Oak Grove.

Sex Ratio

Female: 113 (40.8%)
Male: 164 (59.2%)

Demographics

The racial composition of Oak Grove includes 94.95% White, and smaller percentages for Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White26394.95%
Two or more races93.25%
Asian51.81%
Race
Population ↓
Percentage (of total)
White62.17%
Two or more races10.36%
Race
Population ↓
Percentage (of total)
White25792.78%
Two or more races82.89%
Asian51.81%

Oak Grove Marital Status

Economics and Income Statistics

Oak Grove 's average per capita income is $27,500. Household income levels show a median of $40,972. The poverty rate stands at 25.99%.

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$61,250-
Families$41,607$50,281
Households$40,972$47,347
Non Families$29,479$38,043

$27,500

Average Income

$40,972

Median Household Income

25.99%

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)