Sylvan Island is a island located in Rock Island County, Illinois. It appears on the Davenport East USGS 7.5-minute topographic quadrangle. The nearest populated place is Moline, approximately 1.2 miles to the ESE.
Rock Island County · Illinois
Sylvan Island is a island located in Rock Island County, Illinois. It appears on the Davenport East USGS 7.5-minute topographic quadrangle. The nearest populated place is Moline, approximately 1.2 miles to the ESE.