population naperville il
Population of Naperville, IL. Last official estimated population of Naperville city (DuPage County**, Illinois state) was 146,128 (year 2014)[1]. This was 0.046% of total US population and 1.14% of total Illinois state population. Area of Naperville city is 39.2 miÂ² (=101.6 kmÂ²)[6], in this year population density was 3,724.33 p/miÂ².