What is the population of Naperville, Illinois?
The population of Naperville, Illinois is of 128,358; The United States Census Bureau estimated the population in 2004 at 140,106. It is the fourth largest city in the state, behind Chicago, neighboring Aurora, IllinoisAurora, and Rockford, IllinoisRockford. Approximately 95,000 Napervillians live in DuPage County, while about 40,000 reside in Will County. Source: http://en.wikipedia.