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Jersey County, IL
6 cities and towns and 7 ZIP codes in Jersey County, Illinois.
Population
21,274
Land area
370sq mi
People per sq mi
58
ZIP codes
7
Cities and towns in Jersey County
Jersey County at a glance
- Jersey County is 75% less dense than Illinois as a whole.
- Households here earn a median of $80,361 a year, 4% less than the Illinois figure of $83,390.
- A typical owner-occupied home is valued at $171,900 (35% below Illinois) and median rent is $846 a month.
- The biggest population centers are Jerseyville (7,445), Grafton (734) and Elsah (708).
Local data for Jersey County, IL
Counts from official public data
Housing and community stats
Jersey County, IL, American Community Survey 2020-2024
Median household income
$80,361
Poverty rate
8.8%
Median home value
$171,900
Prices +7.3% in a year
Median rent
$846/mo
Homeownership
80.5%
Bachelor's or higher
22.6%
Median age
43.7
Average commute
27.1 min
Largest reported origins and ancestries: German Americans (6,717), Irish Americans (2,813), Italian Americans (650).
Economy and federal money
Jobs, income, federal spending and pandemic loans
Unemployment rate
3.1%
Sep 2026, -0.7 pts in a year
Average annual pay
$47,411
5,105 jobs, 2025
Income per person
$56,565
BEA, 2024
Federal spending
$150M
FY 2026, $6,981 per person
PPP loans
$34.1M
891 loans, 4,230 jobs reported
Campaign donations
$70.6K
Itemized, 2026 cycle
How people get to work
Jersey County, IL, workers 16 and older. American Community Survey 5-year estimates
- Drove alone74.6%
- Carpooled9.3%
- Public transit0.3%
- Walked3.1%
- Bicycle0.3%
- Taxi, ride-hailing, motorcycle or other0.8%
- Worked from home11.7%
Average one-way commute: 27.1 minutes for people who do not work from home.
Environment and hazard risk
Jersey County, IL, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: landslide
Storm events since 1996
329
Most often thunderstorm wind
Flood insurance policies
72
0.9% of homes, county
July high / Jan low
87° / 19°F
42.2 inches of rain a year
Hazards, floods and storm historyCheck a flood zone8 historic places
Health statistics
Share of adults in Jersey County, IL, CDC PLACES estimates
Obesity
39.0%
U.S. 33.3% +5.7 pts
Diabetes
11.7%
U.S. 12.1% about the same
Smoking
14.0%
U.S. 12.8% +1.2 pts
Uninsured (18-64)
6.9%
U.S. 11.1% -4.2 pts
Cities, towns and ZIP codes in Jersey County
Population shown
Frequently asked questions
- What is the largest city in Jersey County, IL?
- Jerseyville is the largest city or town in Jersey County, with about 7,445 residents.
- How many ZIP codes are in Jersey County?
- Jersey County includes 7 ZIP Code Tabulation Areas, including 62012, 62022, 62028, 62030, 62031.
- What is the population of Jersey County, IL?
- About 21,274 people live in Jersey County, based on American Community Survey 5-year estimates.
- What counties border Jersey County?
- Jersey County borders St. Charles County, MO, Madison County, Macoupin County, Greene County, Calhoun County.
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023