Flat Branch township Flag

Flat Branch township

County:
Shelby County
County Seat:
No
Area (mi²):
33.773
State:
Illinois

Flat Branch township is located in Shelby County, Illinois. Flat Branch township has a 2025 population of 399. Flat Branch township is currently declining at a rate of -0.99% annually and its population has decreased by -3.86% since the most recent census, which recorded a population of 415 in 2020.

The average household income in Flat Branch township is $155,257 with a poverty rate of 4.07%. The median age in Flat Branch township is 55.8 years: 56.6 years for males, and 55.3 years for females.

399
Total Population
12
Density (mi²)
-4 -0.99%
Growth

Flat Branch township Population

Flat Branch township Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Flat Branch township includes 100% White, and smaller percentages for Black or African American, Native American, Asian, Native Hawaiian or Pacific Islander, other race, Two or more races and multiracial populations.

Population by Race

White

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Two or more races

Race
Population
Percentage (of total)
White221100%
Black or African American00%
Native American00%
Asian00%
Native Hawaiian or Pacific Islander00%
Other race00%
Two or more races00%

Flat Branch township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Flat Branch township's average per capita income is $69,871. Household income levels show a median of $144,722. The poverty rate stands at 4.07%.

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
Families$160,956$171,504
Married Families$160,956$171,504
Households$144,722$155,257
Non Families--

$69,871

Average Income

$144,722

Median Household Income

4.07%

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)