Naperville () is a city in DuPage and Will counties in the U.S. state of Illinois and a suburb of Chicago. Located 28 miles (45 km) west of Chicago, Naperville was founded in 1831 and developed into the third-largest city in Illinois. As of the 2010 census, the city had a population of 141,853, which was estimated to have increased to 148,449 by 2019.
In a 2010 study assessing cities with populations exceeding 75,000, Naperville was ranked as the wealthiest city in the Midwest and the eleventh wealthiest in the nation. It was ranked among the nation's safest cities by USA Today and Business Insider. Naperville was voted the second-best place to live in the United States by Money magazine in 2006 and it was rated first on the list of best cities for early retirement in 2013 by Kiplinger. In 2015, it was named as one of the most educated large cities in America with populations over 50,000.
In July 1831, Joseph Naper arrived at the west bank of the DuPage River with his family and friends to found what would be known as Naper's Settlement. Among those original settlers were Naper's wife Almeda Landon, his brother John with wife Betsy Goff, his sister Amy with husband John Murray, and his mother Sarah. Their arrival followed a nearly two-month voyage across three Great Lakes in the Naper brothers' schooner, the Telegraph. Also on the journey were several families who remained in the settlement that would become Chicago, including that of Dexter Graves who is memorialized in Graceland Cemetery by the well-known Lorado Taft statue "Eternal Silence" (also known as "the Dexter Graves Monument").
By 1832, over one hundred settlers had arrived at Naper's Settlement.