Overland Park, Kansas is 55% larger than Naperville, Illinois.
Area: 109 km2 calculated
Naperville is a suburban city of Chicago, located in DuPage and Will counties in the State of Illinois. Naperville was voted the second-best place to live in the United States by Money magazine in 2006. It was rated 1st on the list of best cities for early retirement in 2013 by kiplinger. Wikipedia
Area: 168 km2 calculated
Overland Park is the second most populous city in the U.S. state of Kansas. Located in Johnson County, it is a suburb of Kansas City, Missouri and the second most populous city in the Kansas City metropolitan area. As of the 2010 census, the city population was 173,372. Wikipedia