Mount Vernon township Flag

Mount Vernon township

County Seat:
No
Area (mi²):
37.04
State:
Illinois

Mount Vernon township is located in Jefferson County, Illinois. Mount Vernon township has a 2026 population of 11,988. Mount Vernon township is currently declining at a rate of -0.71% annually and its population has decreased by -4.22% since the most recent census, which recorded a population of 12,516 in 2020.

The median household income in Mount Vernon township is $56,971 with a poverty rate of 15.6%. The median age in Mount Vernon township is 39.5 years: 36.2 years for males, and 43 years for females. For every 100 females there are 105.5 males.

12K
Total Population
324
Density (mi²)
-86 -0.71%
Growth

Mount Vernon township Population

Mount Vernon township Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202611,988-86-0.71%
202512,074-86-0.71%
202412,160-86-0.7%
202312,246-38-0.31%
202212,284-182-1.46%
202112,466-50-0.4%
202012,516-40-0.32%
201912,874-41-0.32%
201812,915-122-0.94%
201713,037-78-0.59%
201613,115-6-0.05%
201513,121-51-0.39%
201413,172-91-0.69%
201313,263-15-0.11%
201213,278-38-0.29%
201113,316-58-0.43%
201013,344-28-0.21%

Median Age

Overall: 39.5 years
Female: 43 years
Male: 36.2 years

Mount Vernon township Adults

There are 9,456 adults, (2,247 of whom are seniors) in Mount Vernon township.

Sex Ratio

Female: 6,003 (48.7%)
Male: 6,332 (51.3%)

Demographics

The racial composition of Mount Vernon township includes 78.39% White, 11.17% Black or African American, and smaller percentages for other race, Native American, Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White9,66978.39%
Black or African American1,37811.17%
Two or more races9297.53%
Other race1691.37%
Native American1020.83%
Asian880.71%
Race
Population ↓
Percentage (of total)
Two or more races2221.8%
Black or African American1321.07%
Other race1311.06%
White50.04%
Race
Population ↓
Percentage (of total)
White9,66478.35%
Black or African American1,24610.1%
Two or more races7075.73%
Native American1020.83%
Asian880.71%
Other race380.31%

Mount Vernon township Marital Status

Economics and Income Statistics

Mount Vernon township 's average per capita income is $38,508. Household income levels show a median of $56,971. The poverty rate stands at 15.6%.

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$88,458-
Families$74,252$88,407
Households$56,971$74,548
Non Families$30,259$44,263

$38,508

Average Income

$56,971

Median Household Income

15.6%

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)