Roads of the Mid-South & West > Highways of the State of Illinois > County Highways of the State of Illinois > County Highways of Lake County > Lake County Highway A4
![](/planet/countyil2/lakea4.jpg) | Lake County Highway A4 |
Lake County Highway A4 is a east-west highway in Northeastern Lake County.
![](/planet/countyil2/jctlakea4n137.jpg)
A junction marker on NB IL St Rt 137.
![](/planet/countyil2/lakea4guiden137.jpg)
A guide marker on NB IL St Rt 137.