Flat Branch Flag

Flat Branch

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

Flat Branch is located in Shelby County, Illinois. Flat Branch has a 2025 population of 414 . Flat Branch is currently growing at a rate of 0.24% annually but its population has decreased by -1.19% since the most recent census, which recorded a population of 419 in 2020.

The average household income in Flat Branch is $155,257 with a poverty rate of 4.07%. The median age in Flat Branch is 55.8 years: 56.6 years for males, and 55.3 years for females. For every 100 females there are 121.0 males.

414
Total Population
12
Density (mi²)
1 0.24%
Growth

Flat Branch Population

Flat Branch Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Flat Branch includes 100% White, and smaller percentages for and multiracial populations.

Population by Race

White (100%)

Race
Population
Percentage (of total)
White221100%

Flat Branch Marital Status

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

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Flat Branch'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

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)