Population21,512 (2020 Census)
River Bluffs Frame Towns and Open Country
Jersey County, IllinoisJerseyville anchors the county, while the river landscapes near Grafton and Pere Marquette connect it to the meeting of major waterways north of the St. Louis region. This guide brings together a starting point for county information, public services and local connections. Begin with Jerseyville, then use the resource links to plan the details of a visit or an everyday errand. Check directly with each provider for current hours, access and service availability before setting out.
Jersey County at a Glance
Population21,512 (2020 Census)
County SeatJerseyville
Largest MunicipalityJerseyville
Established1839
ZIP Codes10 ZIP codes wholly or partly within the county (checked October 4, 2026)
Total Area377.5 sq mi (land and water; 2020 Census geography)
Major RoutesU.S. Route 67; Illinois Route 3; Illinois Route 16; Illinois Route 100; Illinois Route 109
Area Codes618 / 730 (common local area codes)
Meet Your County Advertisers
Local Connections for Everyday Needs
Explore Ryan Construction & Roofing LLC for roofing and construction.
Discover Jersey County
Jersey County
The county was established in 1839 and named for New Jersey. Jerseyville developed as the county seat within a region shaped by river transportation and farming. Today, Jerseyville remains the county seat, while Jerseyville is its largest municipality. The 2020 Census counted 21,512 residents across the county. Its towns and surrounding countryside offer different ways to understand the same place: through public buildings, transportation routes and the communities that connect them. Local records and historical collections provide a starting point for exploring how those connections changed over time.
Life in Jersey County extends beyond a single town center. River landscapes and county towns are part of the local setting, alongside the routine needs of households, schools and businesses. Use county offices for the services they administer and contact municipal or township offices when a question concerns a specific address. Planning around the actual destination helps make visits, appointments and local errands more practical, especially when travel crosses town or county boundaries.
What Shapes Us
Local Heritage
Established in 1839, Jersey County has a history recorded in its communities and public institutions. Start with local collections to explore specific people, buildings and events.
Landscape and Connections
River landscapes and county towns help distinguish Jersey County. Its county seat, Jerseyville, provides a useful starting point for understanding how nearby communities connect across the area.
Everyday Community
County and local offices connect residents with practical services. Follow the linked providers for details specific to your destination, address and purpose in Jersey County.
Explore the towns, follow the stories, make local connections.
A Look Around
Scenes from Jersey County
Places and details that tell a local story.
Alton Telegraph
Jersey County property transfers and sales for Oct. 5-9
Read the full story at Alton Telegraph.
Read the Story Oct 16, 2026 • Local news
Around Jersey County
Stories from every corner of Jersey County.
Jersey County property transfers and sales for Oct. 5-9
Read the full story at Alton Telegraph.
Oct 16, 2026 • Local news
Group Protests Against Proposed Data Center In Jersey County
Read the full story at RiverBender.com.
Oct 16, 2026 • Local news
Jersey County Board District 3 voters to choose 2 seats
Read the full story at Alton Telegraph.
Oct 16, 2026 • Local news
Proposed crypto data center not on Jersey County Board agenda
Read the full story at Alton Telegraph.
Oct 13, 2026 • Local news
Keep These Businesses in Mind
Start with a Direct Conversation
Contact Ryan Construction & Roofing LLC directly to ask about current options, availability and the services you need.
County Resources
Find the Right Local Connection
Start with the responsible public agency or service provider. Statewide links are labeled so you can locate the office that serves your address.
Government
County & Local Resources
Supervisor of Assessments
Property assessments, exemptions and assessment office information.
Phone (618) 498-5571
Schools
County & Local Resources
Hospitals and Health
County & Local Resources
Thomas H Boyd Memorial Hospital
Regional option in Greene County
Address 800 SCHOOL ST, Carrollton
Phone (217) 942-6946
Carlinville Area Hospital
Regional option in Macoupin County
Address 20733 N BROAD STREET, Carlinville
Phone (217) 854-3141
Community Hospital Of Staunton
Regional option in Macoupin County
Address 400 N CALDWELL ST, Staunton
Phone (618) 635-2200
Alton Memorial Hospital
ONE MEMORIAL DRIVE, Alton; (314) 286-2227. Regional option in Madison County.
Phone (314) 286-2227
Public Safety
County & Local Resources
Illinois State Police
Statewide or federal resource; select the office or service for your address.
Illinois State Police contacts
Find the appropriate State Police contact; call 911 for emergencies.
FBI Internet Crime Complaint Center
Report cyber-enabled crime through the federal complaint portal; emergencies require 911.
Emergency Services
County & Local Resources
Illinois Emergency Management Agency and Office of Homeland Security
Statewide or federal resource; select the office or service for your address.
National Weather Service
Statewide or federal resource; select the office or service for your address.
State Parks
County & Local Resources
Pere Marquette State Park
Grafton, Jersey County. Check facilities and access notices.
Beaver Dam State Park
Plainview — regional option in Macoupin County. Check facilities and access notices.
Ray Norbut State Fish and Wildlife Area
Griggsville — regional option in Pike County. Check facilities and access notices.
Jim Edgar Panther Creek State Fish and Wildlife Area
Chandlerville — regional option in Cass County. Check facilities and access notices.
Siloam Springs State Park
Clayton — regional option in Adams County. Check facilities and access notices.
Trails
County & Local Resources
Clifton Terrace Park
Godfrey — regional option in Madison County. Check trail access and permitted uses.
Sam Vadalabene Bike Trail
Alton — regional option in Madison County. Check trail access and permitted uses.
The Nature Institute
Godfrey — regional option in Madison County. Check trail access and permitted uses.
Lake Lou Yaegar Park and Shoal Creek Conservation Area
Litchfield — regional option in Montgomery County. Check trail access and permitted uses.
Lake Lou Yaeger Recreation Area
Litchfield — regional option in Montgomery County. Check trail access and permitted uses.
Utilities
County & Local Resources
Illinois Commerce Commission
Statewide or federal resource; select the office or service for your address.
Illinois 811 — JULIE
Statewide or federal resource; select the office or service for your address.
Illinois energy assistance
Find utility-bill assistance and the local administering agency.
Libraries
County & Local Resources
Jerseyville Public Library
Address 105 North Liberty Street Jerseyville , IL 62052-1512
Phone 618-498-9514
Brighton Memorial Library District
Regional library in Macoupin County; check borrowing eligibility
Address 110 North Main Street Brighton , IL 62012-0183
Phone 618-372-8450
Bunker Hill Public Library District
Regional library in Macoupin County; check borrowing eligibility
Address 220 East Warren Street Bunker Hill , IL 62014-0664
Phone 618-585-4736
Carlinville Public Library
Regional library in Macoupin County; check borrowing eligibility
Address 510 North Broad Street Carlinville , IL 62626-0017
Phone 217-854-3505
Gillespie Public Library
Regional library in Macoupin County; check borrowing eligibility
Address 201 West Chestnut Street Gillespie , IL 62033-1506
Phone 217-839-3614
Courts
County & Local Resources
Illinois Courts
Statewide or federal resource; select the office or service for your address.
Illinois Courts — Forms
Statewide or federal resource; select the office or service for your address.
Illinois Court Help
Court-process information and help for people without an attorney.
DMV
County & Local Resources
Transportation
County & Local Resources
Illinois Department of Transportation
Statewide or federal resource; select the office or service for your address.
Getting Around Illinois
Statewide or federal resource; select the office or service for your address.
Illinois public transportation
Find public transportation information and regional agencies.
IDOT transit programs
Transit program information, including rural and intercity services.
Amtrak Illinois services
Find Illinois intercity rail routes and stations; some counties require travel to a regional station.
Postal Services
County & Local Resources
USPS Location Finder
Statewide or federal resource; select the office or service for your address.
USPS ZIP Code Lookup
Statewide or federal resource; select the office or service for your address.
USPS Informed Delivery
Statewide or federal resource; select the office or service for your address.
Veterans
County & Local Resources
Illinois Department of Veterans Affairs
Statewide or federal resource; select the office or service for your address.
VA Facility Locator
Statewide or federal resource; select the office or service for your address.
Veterans Crisis Line
Statewide or federal resource; select the office or service for your address.
Employment
County & Local Resources
IllinoisJobLink — official job-seeker help
Statewide or federal resource; select the office or service for your address.
Illinois Department of Employment Security
Statewide or federal resource; select the office or service for your address.
Illinois workNet
Statewide or federal resource; select the office or service for your address.
Work for Illinois
Statewide or federal resource; select the office or service for your address.
A Useful Starting Point
County facts and practical links for everyday questions.
Questions and Answers
Get to Know Jersey County
Find background and service information below, then follow the provider links for current details.
Jerseyville is the county seat. Jersey County Government provides county office information; check the office destination before traveling.
Jerseyville is the largest municipality listed in the county reference. Countywide statistics include other communities and unincorporated areas as well.
The 2020 Census counted 21,512 residents. This is a decennial count, not a current-year population estimate.
Jersey County was established in 1839. The county was established in 1839 and named for New Jersey. Jerseyville developed as the county seat within a region shaped by river transportation and farming.
The county covers approximately 377.5 sq mi (land and water; 2020 Census geography). This total includes both land and water, rather than land area alone.
Jerseyville anchors the county, while the river landscapes near Grafton and Pere Marquette connect it to the meeting of major waterways north of the St. Louis region.
Raging Rivers Water Park is in Grafton, Jersey County. Check the provider’s current opening times and visitor information before traveling.
Use USPS ZIP Code Lookup with the full street address. A county boundary does not define a single postal delivery area.
Treehouse Wildlife Center is in Dow, Jersey County. Check the provider’s current opening times and visitor information before traveling.
Pere Marquette State Park is in Grafton, Jersey County. Basic access is the free activity; extras may carry charges. Check the provider’s current opening times and visitor information before traveling.
Begin with the Illinois Department of Veterans Affairs to locate the appropriate service office, or the VA facility locator for federal facilities.
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Local Connections for Everyday Needs
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My Local Guide
Find Something Fun
Explore Local PlacesPlan your next stop around current information from each place.
Kids’ Fun
- Raging Rivers Water Park — Grafton, Jersey County
- Knights Action Park — Springfield — regional option in Sangamon County
- Lincoln Memorial Garden Nature Center — Springfield — regional option in Sangamon County
Restaurants
- Fran and Marilyn's — Jerseyville, Jersey County
- O'Jan's Fish Stand — Grafton, Jersey County
- State Street on Lasalle — Elsah, Jersey County
Shopping & Retail
- Lula Bells — Jerseyville, Jersey County
- State Street Antiques & Jim's Attic — Jerseyville, Jersey County
- David Stine Woodworking — Dow, Jersey County
Clothing & Boutiques
- Lula Bells — Jerseyville, Jersey County
- Dora's Spinning Wheel — Alton — regional option in Madison County
- By Design — Alton — regional option in Madison County
Outdoor Fun
- Treehouse Wildlife Center — Dow, Jersey County
- Aerie's Alpine Coaster — Grafton, Jersey County
- Grafton SkyTour at Aerie’s Resort — Grafton, Jersey County
Free Things To Do
- Pere Marquette State Park — Grafton, Jersey County; basic grounds/trail visit. Rentals, camping, special activities or events may cost extra.
- Beaver Dam State Park — Plainview — regional option in Macoupin County; basic grounds/trail visit. Rentals, camping, special activities or events may cost extra.
- Ray Norbut State Fish and Wildlife Area — Griggsville — regional option in Pike County; basic grounds/trail visit. Rentals, camping, special activities or events may cost extra.
Make Time for Local DiscoveriesChoose Your Next Stop