In a 2010 study, Naperville was named the wealthiest city in the Midwest and eleventh in the nation with a population over 75,000. As of the 2010 census, the city had a total population of 141,857. It is the fifth-largest city in the state, behind Chicago, Aurora, Rockford, and Joliet. Approximately 95,000 Napervillians live on the DuPage County side, while about 45,000 reside on the Will County side. Once a quaint farming town, Naperville has evolved into an affluent city.