Mapes Island is a island located in Mercer County, Illinois. It appears on the Keithsburg USGS 7.5-minute topographic quadrangle. The nearest populated place is Keithsburg, approximately 0.8 miles to the N.
Mercer County · Illinois
Mapes Island is a island located in Mercer County, Illinois. It appears on the Keithsburg USGS 7.5-minute topographic quadrangle. The nearest populated place is Keithsburg, approximately 0.8 miles to the N.