South Lake USGS Williamsfield Quad, Illinois, Topographic Map

South Lake is a Reservoir in the state of Illinois (county of Knox), located at latitude - longitude coordinates (also known as lat-long or GPS coordinates) of N 40.9767 and W -90.12373. South Lake is shown in the center of the topographic (topo) map, which is sourced from the United States Geographical Survey map USGS Williamsfield quad. The nearest major town is Appleton, IL.