Aurora is the second biggest city in the entire state of Illinois, and a top 115 city in the entire county in terms of sheer population. In 2000, the city was listed as having 142,990 residents. Aurora’s metro area is the third biggest in the entire country, with 9.5 million people. Aurora is one of the fastest growing cities in the country, and the U.S. Census Bureau ranked it as the 46th fastest growing city in the ten years between 2000 and 2009. Aurora is commonly known as the “City of Lights”, as it was one of the first cities in the country to adopt electric street lights.