Decatur, Illinois Population 2021

69,966
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Decatur is a city located in Macon County Illinois. It is also the county seat of Macon County. With a 2020 population of 69,966, it is the 17th largest city in Illinois and the 533rd largest city in the United States . Decatur is currently declining at a rate of -0.55% annually and its population has decreased by -8.09% since the most recent census, which recorded a population of 76,122 in 2010. Decatur reached it's highest population of 93,939 in 1980. Spanning over 47 miles, Decatur has a population density of 1,653 people per square mile.

The average household income in Decatur is $59,490 with a poverty rate of 22.09%. The median rental costs in recent years comes to $683 per month, and the median house value is $83,000. The median age in Decatur is 40.2 years, 37.7 years for males, and 41.9 years for females.

Decatur Demographics

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

  • White: 71.18%
  • Black or African American: 20.98%
  • Two or more races: 6.26%
  • Asian: 0.72%
  • Other race: 0.57%
  • Native American: 0.27%
  • Native Hawaiian or Pacific Islander: 0.02%
The current population of Decatur, Illinois is 69,966 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 71,136.The last official US Census in 2010 recorded the population at 76,122.

Decatur, Illinois Population 2021

2019 and 2020 population is estimated by projecting the raw 2018 numbers.

Year Population Growth Growth Rate
2021103,019-495-0.48%
2020103,514-495-0.48%
2019104,009-495-0.48%
2018104,504-895-0.86%
2017105,399-984-0.93%
2016106,383-960-0.90%
2015107,343-1,172-1.09%
2014108,515-1,046-0.96%
2013109,561-573-0.52%
2012110,134-550-0.50%
2011110,684-103-0.09%
2010110,7870.00%

Decatur Metro Area Population by Year

Population by Race

Race Population Percentage
White51,50871.18%
Black or African American15,17820.98%
Two or More Races4,5276.26%
Asian5230.72%
Some Other Race4130.57%
American Indian and Alaska Native1930.27%
Native Hawaiian and Other Pacific Islander170.02%
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Decatur Population by Race

Decatur Population Pyramid $2021

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Decatur Median Age

40.2


Total

37.7


Male

41.9


Female

Decatur Adults

There are 56,973 adults, (14,290 of whom are seniors) in Decatur.

Decatur Age Dependency

69.5

Age Dependency Ratio

33.5

Old Age Dependency Ratio

36

Child Dependency Ratio

Decatur Sex Ratio

Female

38,469

53.16%

Male

33,890

46.84%

Decatur Population by Age

Decatur Renter vs Owner Occupied by Household Type

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Decatur Household Types

Type Owner Renter
Married85.3%14.7%
Male63%37%
All61.4%38.6%
Non Family51.3%48.7%
Female36.9%63.1%

61.4%

Rate of Home Ownership

Decatur Households and Families

Type Count Average Size Owned
All31,1492.2161.4
Non Family14,2241.1851.3
Married10,8182.9485.3
Female4,8033.3636.9
Male1,3043.263

2.98

Average Family Size

2.21

Average Household Size

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Decatur Households by Type

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Education Attained Count Percentage
Less Than 9th Grade1,4242.86%
9th to 12th Grade4,3098.64%
High School Graduate17,87735.84%
Some College12,10724.27%
Associates Degree4,1258.27%
Bachelors Degree6,34012.71%
Graduate Degree3,6937.40%
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Decatur Educational Attainment by Sex (over 25)

Decatur Educational Attainment by Race

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Race Total High School Bachelors
White37,62334,1278,511
Black9,2527,653876
2+ Races1,5601,236138
Hispanic1,015704230
Asian417405267
Other Race24115866
Native American13211135
Islander1717

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 64.03%.

Decatur Educational Attainment by Race

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Name Average Male Female
Overall$33,861$43,182$27,805
Less Than 9th Grade$19,633$21,441$17,619
High School Graduate$27,624$37,819$23,998
Some College$33,522$42,857$27,777
Bachelors Degree$46,545$58,529$37,221
Graduate Degree$58,156$66,687$51,318

$33,861

Average Earnings

$43,182

Average Male

$27,805

Average Female

Decatur Earnings by Educational Attainment

Decatur Language by Age

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Decatur Language

96.39% of Decatur residents speak only English, while 3.61% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.95% of the population.

Decatur Language

Decatur Poverty by Race

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Name Total In Poverty Poverty Rate
White47,9087,41015.47%
Black14,2515,39237.84%
Multiple4,4331,87742.34%
Hispanic1,88448025.48%
Asian52312223.33%
Native1887740.96%
Other4055212.84%
Islander1010100.00%

22.09%

Overall Poverty Rate

19.98%

Male Poverty Rate

23.97%

Female Poverty Rate

Poverty in Decatur

The race most likely to be in poverty in Decatur is Islander, with 100.00% below the poverty level.

The race least likely to be in poverty in Decatur is Other, with 12.84% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 4.40%. Among those working part-time, it was 25.54%, and for those that did not work, the poverty rate was 29.37%.

Decatur Poverty

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Name Poverty
Less Than 9th Grade35.33%
High School18.65%
Some College16.74%
Bachelors or Greater4.72%

Decatur Poverty Rate by Education

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Rate Poverty
Female Unemployed54.36%
Male Unemployed38.84%
Female Employed13.67%
Male Employed7.10%

Decatur Poverty Rate by Employment Status and Sex

Decatur Income by Household Type

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Name Median Mean
Households$42,701$59,490
Families$58,283$74,327
Married Families$77,912$94,835
Non Families$29,455$40,197
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Income by Household Type

Decatur Marital Status

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Marriage Rates

39.0%

Overall Marriage Rate

41.5%

Male Marriage Rate

36.8%

Female Marriage Rate

Decatur Married by Age and Sex

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Decatur Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.

Decatur Marital Status by Race

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Decatur Marital Status

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4,734

Number of Veterans

4,261

Male Veterans

473

Female Veterans

War Veterans
Vietnam1,771
First Gulf War657
Second Gulf War538
Korea440
World War II199

Decatur Veterans by War

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Age Group Veterans
65 to 741,424
75+1,247
35 to 54959
55 to 64781
18 to 34323

Decatur Veterans by Age

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Name Veterans % of Total
White3,9299.17%
Black6846.24%
2+ Races1105.02%
Hispanic584.69%
Asian71.48%
Islander423.53%

Decatur Veterans by Race

Decatur Veterans by Education

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6.80%

Veteran Poverty Rate

28.63%

Veteran Disability Rate

Decatur Veterans by Education

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57.7%

Labor Force Participation

52.4%

Employment Rate

9.2%

Unemployment Rate

Decatur Employment by Age

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Decatur Employment by Race

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Decatur Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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79.52%

Born in Decatur

98.00%

Native Born

2.00%

Foreign Born

1.07%

Non Citizen

0.93%

Naturalized

Place of Birth

98.00% of Decatur residents were born in the United States, with 79.52% having been born in Illinois. 1.07% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Decatur Place of Birth

Year Population Growth Annual Growth Rate
202169,966-390-0.55%
202070,356-390-0.55%
201970,746-390-0.55%
201871,136-654-0.91%
201771,790-720-0.99%
201672,510-755-1.03%
201573,265-890-1.20%
201474,155-800-1.07%
201374,955-494-0.65%
201275,449-473-0.62%
201175,922-183-0.24%
201076,105-5,755-0.73%
200081,860-2,025-0.24%
199083,885-10,054-1.13%
198093,9393,5420.39%
197090,39712,3931.49%
196078,00411,7351.64%
195066,2696,9641.12%
194059,3051,7950.31%
193057,51013,6922.76%
192043,81812,6783.47%
191031,14010,3864.14%
190020,7543,9132.11%
189016,8417,2945.84%
18809,5472,3862.92%
18707,1613,3226.43%
18603,8390.00%

Decatur Population by Year