Welcome to Hamilton County

Steeped in history, Hamilton County, Illinois is located in the region of Southern Illinois
known locally as Little Egypt. The traditionally agriculture based community has in
recent years begun to experience a renaissance of commerce expanding into medical,
coal mining, and various other industries. The county seat and county courthouse are
located in McLeansboro, Illinois a town of 3,000 people.

Learn more about the history of Hamilton County, Illinois below.

History

Recent County Alerts

Real Estate Property Taxes 1st Installment Due Date: August 12, 2025
Real Estate Property Taxes 2nd Installment Due Date: September 12, 2025
Mobile Home Privilege Tax Due Date: July 30th 2025

2025 MCLEANSBORO FALL FESTIVAL
SEPTEMBER 4 - 6, 2025

THURSDAY, SEPTEMBER 4
5:30 PM - Little Miss Fall Festival
6:00 PM - Carnival Rides Open
6:30 - 8:30 PM - Cultural Art Show, Courthouse Basement
7:00 PM - Dale Community Church
Chuck Wagon Gang

FRIDAY, SEPTEMBER 5
6:00 PM - Carnival Rides Open
6:30 - 8:30 PM - Cultural Art Show, Courthouse Basement
7:00 PM - John Spicer

SATURDAY, SEPTEMBER 6
1:00 PM - Carnival Rides Open & Pet Parade
6:00 PM - Fall Festival Parade
7:00 PM - Bias
McBride and The Ride