Clay County, IL demographics:
population, income, and more

Total population
13,052
-0.9% year-over-year change
Median household income
$60,417/yr
5.5% year-over-year change
Housing units
6,165
0.3% year-over-year change

Clay County population

How many people live in Clay County

Clay County is home to 13,052 residents, according to the most recent Census data. Gender-wise, 49.6% of Clay County locals are male, and 50.4% are female.

Total population
13,052
-0.9% year-over-year change
Gender ratio
Male
49.6%
6,480
Female
50.4%
6,572
Value Percent YoY change
Male 6,480 49.6% -1.8%
Female 6,572 50.4% -0.1%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Clay County is 40, with the population distributed as follows: about 19.3% are children under 15, then 11.7% are in the 15 to 24 age group. Adults between 25 and 44 make up 23% of the population, while another 25.1% fall into the 45 to 64 bracket. Finally, around 20.9% are 65 or older.

Median age
40.4
Age breakdown
Under 15
19.3%
15 to 24
11.7%
25 to 44
23%
45 to 64
25.1%
Over 65
20.9%
Value Percent YoY change
Under 15 2,514 19.3% 2.6%
15 to 24 1,527 11.7% 1.5%
25 to 44 3,009 23% -3.1%
45 to 64 3,275 25.1% -3.0%
Over 65 2,727 20.9% -0.4%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Clay County, 98.9% of the population are US-born citizens, while 1% have gained naturalized citizenship. At the same time, 0.1% of residents are non-citizens. As for race, 95.2% of locals are Caucasian, 0.3% are African American and 0.2% have Asian roots. There’s also a share of 3.7% that includes residents with two or more races.

Citizenship
U.S.-born citizens
98.9%
Non-U.S.-born citizens
1%
Non-citizens
0.1%
Value Percent YoY change
U.S.-born citizens 12,903 98.9% -0.6%
Non-U.S.-born citizens 134 1% -22.5%
Non-citizens 15 0.1% -28.6%
Racial breakdown
White
95.2%
Black or African American
0.3%
American Indian and Alaska Native
0.1%
Asian
0.2%
Native Hawaiian and other Pacific Islander
0%
Two or more races
3.7%
Other
0.5%
Value Percent
White 12,431 95.2%
Black or African American 38 0.3%
American Indian and Alaska Native 15 0.1%
Asian 28 0.2%
Two or more races 480 3.7%
Other 60 0.5%

Households in Clay County

A peek inside Clay County households

Clay County has 5,311 households, with an average of 2 members in each. Of these, 62.4% are families, while the remaining 37.6% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
5,311
-2.2% year-over-year change
Average people per household
2
Non-family households
1,996
Family households
3,315
Value Percent YoY change
Non-family households 1,996 37.6% -4.4%
Family households 3,315 62.4% -0.8%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Clay County

The housing landscape of Clay County

Clay County's housing consists of 6,165 units, with 75% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 0.3% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 17.5% of the housing landscape.

Housing units
6,165
0.3% year-over-year change
Housing types
Value Percent
1 unit, detached 4,623 75%
1 unit, attached 19 0.3%
2 units 84 1.4%
3 or 4 units 122 2%
5 to 9 units 120 2%
10 to 19 units 1 0%
20 to 49 units 19 0.3%
50 or more units 66 1.1%
Mobile home 1,077 17.5%
Boat, RV, van, etc. 34 0.6%
Homes built since 2020
67
219.1% year-over-year change

The age of buildings in Clay County

In Clay County, the median construction year is 1972. About 19.7% of homes were built before the 1940s, with another 6.5% going up by 1949. Most development happened in the second half of the 20th century. Then, 8.9% of homes were added from 2000 to 2009, 9.8% between 2010 and 2019, and 1.1% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 1,214 19.7% 7.0%
Built between 1940 and 1949 398 6.5% -8.5%
Built between 1950 and 1959 721 11.7% 2.1%
Built between 1960 and 1969 613 9.9% 5.3%
Built between 1970 and 1979 613 9.9% -8.1%
Built between 1980 and 1989 432 7% -20.0%
Built between 1990 and 1999 958 15.5% -2.5%
Built between 2000 and 2009 546 8.9% -10.6%
Built between 2010 and 2019 603 9.8% 29.1%
Built in 2020 or later 67 1.1% 219.1%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Clay County occupancy rates

Out of the 5,311 occupied housing units in Clay County, 79.3% are owner-occupied, while 20.7% are lived in by tenants. Meanwhile, 13.9% of all homes on the local market sit vacant.

Occupied housing units
5,311
-2.2% year-over-year change
Occupancy breakdown
Renter occupied
1,100
Owner occupied
4,211
Value Percent YoY
change
Renter occupied 1,100 20.7% 5.0%
Owner occupied 4,211 79.3% -3.9%
Unoccupied housing units
13.9%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Clay County housing costs

Housing costs in Clay County come to a median of $738 per month, while tenants specifically pay a median gross rent of $735.

Median housing costs per month
$738/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Clay County
$735/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Clay County

Clay County education at a glance

About 44.6% of the population in Clay County went to high school, while 21.6% pursued college studies. Another 17.3% earned an associate degree and 8.5% hold a bachelor’s. Meanwhile, 3.9% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 402 4% -19.1%
High school diploma 4,434 44.6% -0.0%
College diploma 2,152 21.6% 6.4%
Associate degree 1,718 17.3% -1.0%
Bachelor's degree 849 8.5% -9.5%
Graduate degree 386 3.9% -24.6%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Clay County

How much people earn in Clay County

The average annual household income in Clay County was $78,529 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -1.1% change from the previous year. At the same time, the median income stood at $60,417, reflecting a +5.5% shift over the same period.

Average household income in Clay County
$78,529/year
-1.1% year-over-year change
Median household income in Clay County
$60,417/year
5.5% year-over-year change

Clay County income by age

In Clay County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $75,078. Those with someone between 45 and 64 in charge, often well established professionally, earn $82,746 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $80,694, while those led by someone over 65, many of whom may be retired, have about $42,809 in earnings. Overall, 82.4% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $80,694 29.2%
25 - 44 $75,078 7.2%
45 - 64 $82,746 4.3%
Over 65 $42,809 4.8%
Above poverty level
10,511
Below poverty level
2,245
Value Percent YoY
change
Above poverty level 10,511 82.4% -1.6%
Below poverty level 2,245 17.6% 4.0%

Employment in Clay County

Workforce and job types in Clay County

The job market in Clay County is powered by 5,585 working residents, spread across a range of industries and roles. 64.6% of the working population are employed in professional or administrative positions, while 35.4% are in hands-on or service-based jobs. Also, 8.1% run their own businesses, 67.2% are employed by private companies, and 15.7% work in the public sector.

Workforce demographics

Working population
5,585
-0.7% year-over-year change
White collar
3,610
Blue collar
1,975
Value Percent YoY change
White collar 3,610 64.6% -1.9%
Blue collar 1,975 35.4% 1.7%
Employer type
Self employees
8.1%
Private companies
67.2%
Governmental workers
15.7%
Not for profit companies
9%
Value Percent YoY change
Self employees 453 8.1% -6.8%
Private companies 3,755 67.2% -1.7%
Governmental workers 876 15.7% 21.3%
Not for profit companies 501 9% -15.9%
Unemployment rate
4.8%
-19.3% year-over-year change

Available workforce

The unemployment rate in Clay County stands at 4.8%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Clay County

How people get around in Clay County

Commuting methods vary: 94.7% of residents travel by personal vehicle and 0.6% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 5,255 94.7% 2.3%
Bus or trolleybus 17 0.3% -5.6%
Walk 33 0.6% -26.7%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Clay County by zipcode?

Zipcode Population Number of households Median income Average income
62824 1,485 626 $61,591 $67,685
62838 1,341 500 $82,976 $95,531
62839 6,183 2,550 $53,685 $81,350
62426 778 410 $51,667 $66,672
62434 191 105 $0 $59,779
62443 1,609 618 $86,950 $88,189
62858 3,554 1,371 $66,319 $79,957
62868 1,463 607 $61,645 $64,716
62879 28 15 $26,964 $32,487
62899 2,022 666 $55,482 $63,919

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FAQs about Clay County demographics 

What is the total population of Clay County?

Clay County has a total population of 13,052 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -0.9% compared to a year ago.

What is the gender ratio in Clay County?

The gender ratio in Clay County is as follows:
  • 49.6% males (6,480 residents)
  • 50.4% females (6,572 residents)

What is the median age in Clay County?

The median age in Clay County is 40.4.

What is the age distribution of the population in Clay County?

The age distribution in Clay County is as follows:
  • Under 15: 19.3% (2,514 residents)
  • Ages 15-24: 11.7% (1,527 residents)
  • Ages 25-44: 23% (3,009 residents)
  • Ages 45-64: 25.1% (3,275 residents)
  • Over 65: 20.9% (2,727 residents)

What is the racial and ethnic makeup of Clay County?

The racial and ethnic makeup of Clay County is as follows:
  • White: 95.2% (12,431 residents)
  • Black or African American: 0.3% (38 residents)
  • American Indian and Alaska Native: 0.1% (15 residents)
  • Asian: 0.2% (28 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 3.7% (480 residents)
  • Other: 0.5% (60 residents)

What percentage of the population in Clay County are U.S.-born citizens?

U.S.-born citizens represent 98.9% of the population in Clay County.

How many housing units are there in Clay County?

There are 6,165 housing units in Clay County, reflecting a +0.3% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Clay County and what is the average household size?

Clay County has a total of 5,311 households, with an average of 2 people in each.

What is the median household income in Clay County?

Clay County has a median household income of $60,417, representing a +5.5% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Clay County?

The employment rate is 95.2% in Clay County, with a workforce of 5,585 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 64.6% (3,610 residents)
  • Blue-collar workers: 35.4% (1,975 residents)

Places of employment:
  • Self-employed: 8.1% (453 residents)
  • Private companies: 67.2% (3,755 residents)
  • Governmental workers: 15.7% (876 residents)
  • Not-for-profit companies: 9% (501 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025