Aurora, "The City of Lights", lies within four counties: Kane, DuPage, Kendall, and Will and is the second-largest city of Illinois. The city is known as a technology and research corridor of the state, and its economy is based on manufacturing. Average home value is $233,800; rent is $1,105, while average income is $51,300. Ameriprise Financial, Prista Inc, Principal Financial Group are some of its top financial companies.