Illinois State Route 173 is a east-west highway across Northern Mc Henry County. This runs from the Lake/Mc Henry County Line, at Fox Lake, to the Boone/Mc Henry County Line, near Capron. IL St Rt 173 passes through the following towns in Mc Henry County. Fox Lake Spring Grove Richmond
Hebron Alden Harvard
Chemung IL St Rt 173 is multi-plexed in Mc Henry County. U.S. Rt. 14, at Harvard.