Ingleside is an unincorporated community in Lake County, Illinois, United States. Ingleside is between Fox Lake, Round Lake Heights and Lake Villa.
Ingleside is on Squaw Creek (also called Indian River) between Long Lake, Duck Lake, and Fox Lake.
Ingleside lies below the Long Lake Dam and above Fox Lake. Duck lake and most of the Long Lake area are part of Ingleside. Ingleside also goes northwest to Lake Villa, Illinois.