Population49,284 (2020 Census)
Prairie Towns Share a Rich Regional Heritage
Henry County, IllinoisCambridge is the county seat and Kewanee the largest city. Geneseo, Galva and other communities connect the county’s agricultural landscape with the Quad Cities region. This guide brings together a starting point for county information, public services and local connections. Begin with Cambridge, 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.
Henry County at a Glance
Population49,284 (2020 Census)
County SeatCambridge
Largest MunicipalityKewanee
Established1825
ZIP Codes24 ZIP codes wholly or partly within the county (checked October 4, 2026)
Total Area825.7 sq mi (land and water; 2020 Census geography)
Major RoutesI-74; I-80; I-280; US 6; US 34
Area Codes309 / 861 (common local area codes)
Meet Your County Advertisers
Local Connections for Everyday Needs
Explore Hutchinson Electric and Insulation for electrical and insulation work.
Discover Henry County
Henry County
The county was formed from Fulton County in 1825 and named for Patrick Henry. Cambridge developed as the seat of county government during the following decades. Today, Cambridge remains the county seat, while Kewanee is its largest municipality. The 2020 Census counted 49,284 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 Henry County extends beyond a single town center. Prairie towns and regional connections 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 1825, Henry 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
Prairie towns and regional connections help distinguish Henry County. Its county seat, Cambridge, 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 Henry County.
Explore the towns, follow the stories, make local connections.
A Look Around
Scenes from Henry County
Places and details that tell a local story.
Kewanee Voice
Henry County Board candidates share priorities, Breeden, Carr and Brown
Read the full story at Kewanee Voice.
Read the Story Oct 19, 2026 • Local news
Around Henry County
Stories from every corner of Henry County.
Henry County Board candidates share priorities, Breeden, Carr and Brown
Read the full story at Kewanee Voice.
Oct 19, 2026 • Local news
See who bought and sold property in Henry County, Sept. 25-Oct. 9
Read the full story at Kewanee Voice.
Oct 12, 2026 • Local news
Henry County Humane Society welcomes 'Weather Watch Kittens'
Read the full story at wqad.com.
Oct 8, 2026 • Local news
Keep These Businesses in Mind
Start with a Direct Conversation
Contact Hutchinson Electric and Insulation 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 (309) 937-3570
Schools
County & Local Resources
Hospitals and Health
County & Local Resources
Genesis Hlth System Dba Genesis Mdl Ctr-Illini
Regional option in Rock Island County
Address 801 ILLINI DR, Silvis
Phone (309) 281-4000
Trinity Rock Island
Regional option in Rock Island County
Address 2701 17TH ST, Rock Island
Phone (309) 779-5000
St Mary Medical Center
Regional option in Knox County
Address 3333 NORTH SEMINARY, Galesburg
Phone (309) 344-3161
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.
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
Rock Island Trail State Park
Wyoming — regional option in Stark County. Check facilities and access notices.
Snakeden Hollow State Fish and Wildlife Area
Victoria — regional option in Knox County. Check facilities and access notices.
Donnelley/Depue State Fish and Wildlife Area & Complex
De Pue — regional option in Bureau County. Check facilities and access notices.
Mautino State Fish and Wildlife Area
Sheffield — regional option in Bureau County. Check facilities and access notices.
Marshall State Fish and Wildlife Area
Lacon — regional option in Marshall County. Check facilities and access notices.
Trails
County & Local Resources
Rock Island Trail State Park
Wyoming — regional option in Stark County. Check trail access and permitted uses.
Mississippi River Trail
Rock Island — regional option in Rock Island County. Check trail access and permitted uses.
Black Hawk State Historic Site
Rock Island — regional option in Rock Island County. Check trail access and permitted uses.
Quad Cities CVB Bike Rentals
Moline — regional option in Rock Island County. Check trail access and permitted uses.
Schwiebert Riverfront Park
Rock Island — regional option in Rock Island 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
Annawan-Alba Township Library
Address 200 North Meadow Lane Suite 2 Annawan , IL 61234-7607
Phone 309-935-6483
Cambridge Public Library District
Address 212 West Center Street Cambridge , IL 61238-1239
Phone 309-937-2233
Clover Public Library District
Address 440 North Division Street Post Office Box 369 Woodhull , IL 61490-0369
Phone 309-334-2680
Galva Public Library District
Address 120 Northwest Third Avenue Galva , IL 61434-1326
Phone 309-932-2180
Courts
County & Local Resources
Illinois Courts
Statewide or federal resource; select the office or service for your address.
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
Employment Find current job openings and apply fast and easy
Official Henry County office information.
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 Henry County
Find background and service information below, then follow the provider links for current details.
Cambridge is the county seat. Henry County Government provides county office information; check the office destination before traveling.
Kewanee is the largest municipality listed in the county reference. Countywide statistics include other communities and unincorporated areas as well.
The 2020 Census counted 49,284 residents. This is a decennial count, not a current-year population estimate.
Henry County was established in 1825. The county was formed from Fulton County in 1825 and named for Patrick Henry. Cambridge developed as the seat of county government during the following decades.
The county covers approximately 825.7 sq mi (land and water; 2020 Census geography). This total includes both land and water, rather than land area alone.
Cambridge is the county seat and Kewanee the largest city. Geneseo, Galva and other communities connect the county’s agricultural landscape with the Quad Cities region.
Niabi Zoo is in Coal Valley, Rock Island County. This is a regional option outside Henry 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.
Mautino State Fish and Wildlife Area is in Sheffield, Bureau County. This is a regional option outside Henry County. Check the provider’s current opening times and visitor information before traveling.
Mautino State Fish and Wildlife Area is in Sheffield, Bureau County. This is a regional option outside Henry 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.
Meet Your County Advertisers
Local Connections for Everyday Needs
Explore Hutchinson Electric and Insulation for electrical and insulation work.
My Local Guide
Find Something Fun
Explore Local PlacesPlan your next stop around current information from each place.
Kids’ Fun
- Niabi Zoo — Coal Valley — regional option in Rock Island County
- Quad City Family Entertainment Center — Moline — regional option in Rock Island County
- Whitewater Junction — Rock Island — regional option in Rock Island County
Restaurants
- Lavender Crest Winery — Colona, Henry County
- Exotic Thai Restaurant — Moline — regional option in Rock Island County
- Jennie's Box Car — East Moline — regional option in Rock Island County
Shopping & Retail
- Leaf Livestock Wool Co — Geneseo, Henry County
- SouthPark Mall — Moline — regional option in Rock Island County
- Hornbaker Gardens — Princeton — regional option in Bureau County
Clothing & Boutiques
- Mother Goosebumps — Galesburg — regional option in Knox County
- Five22 — Princeton — regional option in Bureau County
- Four Seasons — Princeton — regional option in Bureau County
Outdoor Fun
- Mautino State Fish and Wildlife Area — Sheffield — regional option in Bureau County
- Snakeden Hollow State Fish and Wildlife Area — Victoria — regional option in Knox County
- Rock Island Trail State Park — Wyoming — regional option in Stark County
Free Things To Do
- Mautino State Fish and Wildlife Area — Sheffield — regional option in Bureau County; basic grounds/trail visit. Rentals, camping, special activities or events may cost extra.
- Snakeden Hollow State Fish and Wildlife Area — Victoria — regional option in Knox County; basic grounds/trail visit. Rentals, camping, special activities or events may cost extra.
- Rock Island Trail State Park — Wyoming — regional option in Stark County; basic grounds/trail visit. Rentals, camping, special activities or events may cost extra.
Make Time for Local DiscoveriesChoose Your Next Stop