Jefferson County, Illinois's estimated 2024 population is 36,221 with a growth rate of -0.27% in the past year according to the most recent United States census data. Jefferson County, Illinois is the 38th largest county in Illinois. The 2010 population was 38,757 and has seen a growth of -6.54% since that time.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2029 | 35,726 | -99 | -0.28% |
| 2028 | 35,825 | -99 | -0.28% |
| 2027 | 35,924 | -99 | -0.27% |
| 2026 | 36,023 | -99 | -0.27% |
| 2025 | 36,122 | -99 | -0.27% |
| 2024 | 36,221 | -99 | -0.27% |
| 2023 | 36,320 | -99 | -0.27% |
| 2022 | 36,419 | -470 | -1.27% |
| 2021 | 36,889 | -106 | -0.29% |
| 2020 | 36,995 | -640 | -1.7% |
| 2019 | 37,635 | -69 | -0.18% |
| 2018 | 37,704 | -355 | -0.93% |
| 2017 | 38,059 | -177 | -0.46% |
| 2016 | 38,236 | -54 | -0.14% |
| 2015 | 38,290 | -100 | -0.26% |
| 2014 | 38,390 | -266 | -0.69% |
| 2013 | 38,656 | -16 | -0.04% |
| 2012 | 38,672 | -86 | -0.22% |
| 2011 | 38,758 | 1 | 0% |
| 2010 | 38,757 | 0 | 0% |
| 1990 | 37,020 | 468 | 1.28% |
| 1980 | 36,552 | 5,106 | 16.24% |
| 1970 | 31,446 | -869 | -2.69% |
| 1960 | 32,315 | -3,577 | -9.97% |
| 1950 | 35,892 | 1,517 | 4.41% |
| 1940 | 34,375 | 3,341 | 10.77% |
| 1930 | 31,034 | 2,554 | 8.97% |
| 1920 | 28,480 | -631 | -2.17% |
| 1910 | 29,111 | 978 | 3.48% |
| 1900 | 28,133 | 5,543 | 24.54% |
| 1890 | 22,590 | 1,904 | 9.2% |
| 1880 | 20,686 | 2,822 | 15.8% |
| 1870 | 17,864 | 4,899 | 37.79% |
| 1860 | 12,965 | 4,856 | 59.88% |
| 1850 | 8,109 | 2,347 | 40.73% |
| 1840 | 5,762 | 3,207 | 125.52% |
| 1830 | 2,555 | 1,864 | 269.75% |
| 1820 | 691 | -35,035 | -98.07% |
White
Black or African American
Two or more races
Asian
Other race
Native American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 14,778 | 2.39 | 72 | 28 |
| Married | 7,085 | 2.99 | 91 | 9 |
| Non Family | 4,971 | 1.17 | 56.8 | 43.2 |
| Female | 1,954 | 3.11 | 42.3 | 57.7 |
| Male | 768 | 3.07 | 70.4 | 29.6 |
2.91
Average Family Size
2.39
Average Household Size
72.0%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
The highest rate of high school graduation is among islander people with a rate of 100%.
The highest rate of bachelors degrees is among asian people with a rate of 28.95%.
All
Male
Female
$40,843
Average Earnings
$49,046
Average Male
$31,291
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
96.09% of Jefferson County, Illinois residents speak only English, while 3.91% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 1.51% of the population.
rate
14.13%
Overall Poverty Rate
10.93%
Male Poverty Rate
17.3%
Female Poverty Rate
The race most likely to be in poverty in Jefferson County, Illinois is Other, with 33.79% below the poverty level.
The race least likely to be in poverty in Jefferson County, Illinois is Asian, with 3.37% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 2.38%. Among those working part-time, it was 18.73%, and for those that did not work, the poverty rate was 19.96%.
Married
Widowed
Divorced
Separated
NeverMarried
50.4%
Overall Marriage Rate
49.9%
Male Marriage Rate
51.1%
Female Marriage Rate
male
female
The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 45-54.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
4.7%
Veteran Poverty Rate
37.47%
Veteran Disability Rate
LaborForceParticipation
58.7%
Labor Force Participation
54.9%
Employment Rate
6.5%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
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.
Europe
Asia
Africa
Oceania
Latin America
North America
79.07%
Born in Jefferson County, Illinois
98.34%
Native Born
1.66%
Foreign Born
0.59%
Non Citizen
1.07%
Naturalized
98.34% of Jefferson County, Illinois residents were born in the United States, with 79.07% having been born in Illinois. 0.59% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.