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.


Recent County Alerts

Real Estate Property Taxes 1st Installment Due Date: August 15th 2023
Real Estate Property Taxes 2nd Installment Due Date: September 15th 2023
Mobile Home Privilege Tax Due Date: July 31st 2023