Township of Duncan is a civil located in Mercer County, Illinois. It appears on the Buffalo Prairie USGS 7.5-minute topographic quadrangle. The nearest populated place is Marston, approximately 2.5 miles to the NE.
Mercer County · Illinois
Township of Duncan is a civil located in Mercer County, Illinois. It appears on the Buffalo Prairie USGS 7.5-minute topographic quadrangle. The nearest populated place is Marston, approximately 2.5 miles to the NE.