Decatur, Illinois Population 2020

69,974

Decatur is a city located in Illinois. With a 2020 population of 69,974, it is the 17th largest city in Illinois and the 531st largest city in the United States. Decatur is currently declining at a rate of -0.93% annually and its population has decreased by -8.08% 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 $58,634 with a poverty rate of 21.14%. The median rental costs in recent years comes to $669 per month, and the median house value is $81,800. The median age in Decatur is 40 years, 36.9 years for males, and 42 years for females. For every 100 females there are 87.8 males.

Decatur Demographics

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

  • White: 71.40%
  • Black or African American: 20.47%
  • Two or more races: 6.22%
  • Asian: 0.91%
  • Other race: 0.67%
  • Native American: 0.33%
  • Native Hawaiian or Pacific Islander: 0.01%
The current population of Decatur, Illinois is 69,974, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 71,290.The last official US Census in 2010 recorded the population at 76,122.

Decatur, Illinois Population 2020

Year Total Population Growth Annual Growth Rate
2020103,070-821-0.80%
2019103,891-821-0.79%
2018104,712-821-0.78%
2017105,533-897-0.85%
2016106,430-933-0.88%
2015107,363-1,157-1.08%
2014108,520-1,043-0.96%
2013109,563-567-0.52%
2012110,130-541-0.49%
2011110,671-113-0.10%
2010110,7840.00%

Population by Race

Race Population Percentage
White52,09871.40%
Black or African American14,93720.47%
Two or More Races4,5376.22%
Asian6610.91%
Some Other Race4880.67%
American Indian and Alaska Native2430.33%
Native Hawaiian and Other Pacific Islander50.01%

Decatur Population Pyramid 2020

Decatur Median Age

40


Total

36.9


Male

42


Female

Decatur Adults

There are 57,079 adults, (13,862 of whom are seniors) in Decatur.

Decatur Age Dependency

68.8

Age Dependency Ratio

32.1

Old Age Dependency Ratio

36.8

Child Dependency Ratio

Decatur Sex Ratio

Female

38,846

53.24%

Male

34,123

46.76%

Decatur Households and Families

Decatur Renter vs Owner Occupied by Household Type

Decatur Household Types

Type Owner Renter
Married86.7%13.3%
All63%37%
Male62.7%37.3%
Non Family53%47%
Female37.8%62.2%

63.0%

Rate of Home Ownership

Type Count Average Size Owned
All31,0622.2463
Non Family13,7251.1753
Married11,0792.9686.7
Female4,9873.337.8
Male1,2713.1962.7

2.97

Average Family Size

2.24

Average Household Size

7.1%

Unmarried (Opposite Sex)

0.4%

Unmarried (Same Sex)

Decatur Education

Education Attained Count Percentage
Less Than 9th Grade1,4282.87%
9th to 12th Grade4,3898.82%
High School Graduate17,19534.55%
Some College12,24224.60%
Associates Degree4,2498.54%
Bachelors Degree6,34712.75%
Graduate Degree3,9217.88%

Decatur Educational Attainment by Race

Name Total High School Bachelors
White37,83034,2688,624
Black8,7877,174938
Multiple Races1,6841,334125
Hispanic1,016732289
Asian430396288
Other Race294215106
Native American1069728
Islander55

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 66.98%.

Name Average Male Female
Overall$32,447$41,608$26,586
Less Than High School$16,623$16,267$16,946
High School Grad$26,186$36,096$22,442
Some College$32,592$41,266$27,112
Bachelors Degree$44,597$60,066$37,083
Graduate Degree$63,177$76,490$57,799

$32,447

Average Earnings

$41,608

Average Male

$26,586

Average Female

Decatur Language

Decatur Language by Age

Decatur Language

96.31% of Decatur residents speak only English, while 3.69% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.69% of the population.

Decatur Poverty

Decatur Poverty by Race

Name Total In Poverty Poverty Rate
White48,5587,41115.26%
Black13,9034,79334.47%
Multiple4,4691,89542.40%
Hispanic1,91353427.91%
Native23914560.67%
Asian6487711.88%
Other482336.85%
Islander55100.00%

21.14%

Overall Poverty Rate

19.36%

Male Poverty Rate

22.71%

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 6.85% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 4.14%. Among those working part-time, it was 24.91%, and for those that did not work, the poverty rate was 26.77%.

Name Poverty
Less Than High School32.74%
High School17.71%
Some College15.54%
Bachelors or Greater3.92%
Name Poverty
Female Unemployed55.61%
Male Unemployed33.37%
Female Employed13.40%
Male Employed7.41%

Decatur Income

Decatur Income by Household Type

Name Median Mean
Households$42,908$58,634
Families$57,933$71,902
Married Families$77,147$91,688
Non Families$28,204$39,849

Decatur Marital Status

Decatur Marital Status

Marriage Rates

39.8%

Overall Marriage Rate

42.4%

Male Marriage Rate

37.6%

Female Marriage Rate

Decatur Married by Age and Sex

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

Decatur Veterans

4,658

Number of Veterans

4,277

Male Veterans

381

Female Veterans

War Veterans
Vietnam1,610
First Gulf War678
Second Gulf War605
Korea489
World War II210
Age Group Veterans
75+1,235
65 to 741,232
35 to 541,012
55 to 64766
18 to 34413
Name Veterans % of Total
White3,9329.11%
Black5405.11%
2 or More1335.91%
Asian539.31%
Hispanic514.36%

$Decatur Veterans by Education

5.83%

Veteran Poverty Rate

27.78%

Veteran Disability Rate

Decatur Employment Status

59.8%

Labor Force Participation

54.3%

Employment Rate

9.1%

Unemployment Rate

Decatur Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

79.30%

Born in Illinois

97.93%

Native Born

2.07%

Foreign Born

1.15%

Non Citizen

Place of Birth

97.93% of Decatur residents were born in the United States, with 79.30% having been born in Illinois. 1.15% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Year Population Growth Annual Growth Rate
202069,974-658-0.93%
201970,632-658-0.92%
201871,290-602-0.84%
201771,892-658-0.91%
201672,550-737-1.01%
201573,287-876-1.18%
201474,163-801-1.07%
201374,964-487-0.65%
201275,451-467-0.62%
201175,918-187-0.25%
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%