Aurora is a city in Kane, DuPage, Will and Kendall counties in Illinois, United States. As of the 2000 census, the city population was 142,990, making it the third-largest city in Illinois; in 2003, behind Chicago and Rockford, and just above neighboring Naperville, Illinois. A special census found the city's population to be 157,267. Some Aurora residents claim this makes it the second-largest city in Illinois, just ahead of Rockford, but Rockford was not recounted at the same time, thus the matter may not be settled until the 2010 US Census. About 115,000 residents live in Aurora Township. This brings the total population of the city to 272,820, although only the 157,267 number is official. About 110,000 of the city's residents reside in Kane County, while about 42,000 live in DuPage County. Only a few thousand Aurorans are in Will and Kendall Counties. Aurora apartments for rent comparison page shows most up to date rent information on Aurora apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.