Tunnel Hill is an unincorporated community in northwestern Johnson County, Illinois. It is best known for its namesake railroad tunnel that gives the name to the Tunnel Hill State Trail, a rails-to-trails project developed by the Illinois Department of Natural Resources.

Tunnel Hill
Tunnel Hill, high point and eponym of the Tunnel Hill State Trail
Tunnel Hill, high point and eponym of the Tunnel Hill State Trail
Tunnel Hill is located in Illinois
Tunnel Hill
Tunnel Hill
Location of Tunnel Hill within Illinois
Tunnel Hill is located in the United States
Tunnel Hill
Tunnel Hill
Tunnel Hill (the United States)
Coordinates: 37°31′25″N 88°50′19″W / 37.52361°N 88.83861°W / 37.52361; -88.83861
CountryUnited States
StateIllinois
CountyJohnson
Time zoneUTC-6 (CST)
 • Summer (DST)UTC-5 (CDT)
Postal code
62972
Area code618