Flat Branch, Illinois Population 2024

407

Flat Branch is a city located in Illinois. Flat Branch has a 2024 population of 407. Flat Branch is currently declining at a rate of -0.73% annually and its population has decreased by -2.16% since the most recent census, which recorded a population of 416 in 2020.

The average household income in Flat Branch is $144,977 with a poverty rate of 3.24%. The median age in Flat Branch is 50 years: 51.6 years for males, and 47.5 years for females.

Flat Branch Demographics

According to the most recent ACS, the racial composition of Flat Branch was:

  • White: 100%
  • Black or African American: 0%
  • Native American: 0%
  • Asian: 0%
  • Native Hawaiian or Pacific Islander: 0%
  • Other race: 0%
  • Two or more races: 0%
Land Area (mi²)
33.8 sq mi
Density (mi²)
12.10/sq mi
Growth Since 2020
-2.16% (-9)
The current population of Flat Branch, Illinois is 407 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 416.

Population by Race

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Race
Population
Percentage (of total)
White278100%
Black or African American00%
Native American00%
Asian00%
Native Hawaiian or Pacific Islander00%
Other race00%
Two or more races00%

White

Black or African American

Native American

Asian

Native Hawaiian or Pacific Islander

Other race

Two or more races

Flat Branch Population by Race

Flat Branch Population Pyramid 2024

Flat Branch Median Age

50

Total

51.6

Male

47.5

Female

Flat Branch Adults

There are 224 adults, (14 of whom are seniors) in Flat Branch.

Flat Branch Age Dependency

32.4

Age Dependency Ratio

6.7

Old Age Dependency Ratio

25.7

Child Dependency Ratio

Flat Branch Sex Ratio

Female13950%
Male13950%

Flat Branch Population by Age

Flat Branch Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All1052.6571.428.6
Married912.975.824.2
Non Family14042.957.1
Male0000
Female0000

2.9

Average Family Size

2.65

Average Household Size

71.4%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Flat Branch Households and Families

Male

Female

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Education Attained
Count
Percentage
9th to 12th Grade00%
Associates Degree157.54%
Bachelors Degree4623.12%
Graduate Degree2211.06%
High School Graduate10452.26%
Less Than 9th Grade00%
Some College126.03%

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Flat Branch Educational Attainment by Sex (over 25)

Flat Branch Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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Race
Total
High School
Bachelors
White19919968

The highest rate of high school graduation is among white people with a rate of 100%.

The highest rate of bachelors degrees is among white people with a rate of 34.17%.

Flat Branch Educational Attainment by Race

All

Male

Female

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Name
Average
Male
Female
Bachelors Degree$65,417$0$59,844
Graduate Degree$0$0$0
High School Graduate$66,181$71,250$14,000
Less Than 9th Grade$0$0$0
Overall$66,000$71,786$0
Some College$0$0$0

$66,000

Average Earnings

$71,786

Average Male

$0

Average Female

Flat Branch Earnings by Educational Attainment

Flat Branch Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Flat Branch Language

100% of Flat Branch residents speak only English, while 0% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0% of the population.

Flat Branch Language

Flat Branch Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White27893.24%

3.24%

Overall Poverty Rate

2.88%

Male Poverty Rate

3.6%

Female Poverty Rate

Poverty in Flat Branch

The race most likely to be in poverty in Flat Branch is White, with 3.24% below the poverty level.

The race least likely to be in poverty in Flat Branch is White, with 3.24% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0%. Among those working part-time, it was 0%, and for those that did not work, the poverty rate was 23.08%.

Flat Branch Poverty

rate

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Rate
Poverty
Less Than 9th Grade0%
Some College18.52%
High School3.85%
Bachelors or Greater0%

Flat Branch Poverty Rate by Education

rate

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Rate
Poverty
Male Employed0%
Male Unemployed0%
Female Employed0%
Female Unemployed0%

Flat Branch Poverty Rate by Employment Status and Sex

Flat Branch Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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Name
Median
Mean
Families$135,729$157,204
Households$131,250$144,977
Married Families$135,729$-999,999,999
Non Families-$-999,999,999

mean

median

Income by Household Type

Flat Branch Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

76.1%

Overall Marriage Rate

75.8%

Male Marriage Rate

76.5%

Female Marriage Rate

Flat Branch Married by Age and Sex

male

female

Flat Branch Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 35-44.

Flat Branch Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Flat Branch Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

13

Number of Veterans

13

Male Veterans

0

Female Veterans

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War
Veterans
Second Gulf War7
Vietnam6
First Gulf War0
Korea0
World War II0

Flat Branch Veterans by War

count

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Age Group
Veterans
55 to 647
65 to 746
18 to 340
35 to 540
75+0

Flat Branch Veterans by Age

count

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Name
Veterans
% of Total
White135.8%

Flat Branch Veterans by Race

Flat Branch Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

0%

Veteran Poverty Rate

46.15%

Veteran Disability Rate

Flat Branch Veterans by Education

LaborForceParticipation

84%

Labor Force Participation

80.2%

Employment Rate

4.4%

Unemployment Rate

Flat Branch Employment by Age

LaborForceParticipation

Flat Branch Employment by Race

LaborForceParticipation

Flat Branch Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

87.41%

Born in Flat Branch

100%

Native Born

0%

Foreign Born

0%

Non Citizen

0%

Naturalized

Place of Birth

100% of Flat Branch residents were born in the United States, with 87.41% having been born in Illinois. 0% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Flat Branch Place of Birth

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
2029392-3-0.76%
2028395-3-0.75%
2027398-3-0.75%
2026401-3-0.74%
2025404-3-0.74%
2024407-3-0.73%
2023410-3-0.73%
2022413-3-0.72%
202141600%
2020416-16-3.7%
201943200%
2018432-2-0.46%
201743420.46%
2016432-3-0.69%
2015435-4-0.91%
2014439-1-0.23%
201344000%
201244000%
2011440-2-0.45%
201044200%

Flat Branch Population by Year