Aurora is a city in northeastern Illinois, United States. Located primarily in DuPage and Kane counties along the Fox River, it is the second-most populous city in Illinois, after Chicago, and the 144th-most populous city in the U.S. The population was 180,542 at the 2020 census. Founded within Kane County, Aurora's city limits have expanded into DuPage, Kendall, and Will counties. Once a mid-sized manufacturing city, Aurora has grown since the 1960s into a large city within the Chicago metropolitan area. In 1908, Aurora adopted the nickname "City of Lights", because in 1881 it was one of the first cities in the United States to implement an all-electric street lighting system. Aurora's historic downtown is centered on Stolp Island. The city is divided into three regions, the West Side, East Side, and Far East Side/Fox Valley. The Aurora area has some significant architecture, including structures by Frank Lloyd Wright, Ludwig Mies van der Rohe, Bruce Goff and George Grant Elmslie.

Country: United States
State: Illinois
Counties: DuPage, Kane, Kendall, Will
Townships: Aurora (Kane), Batavia (Kane), Sugar Grove (Kane), Naperville (DuPage), Winfield (DuPage), Oswego (Kendall), Wheatland (Will)
Settled: 1834
Incorporated (village): 1845
Incorporated (city): 1857
Founded by: Harold E. Styles
• Type: Mayor–council
• Mayor: Richard Irvin (R)
Population (2020): 180,542
• Rank: US: 144th
Time zone: CST (UTC−6)
• Summer (DST): CDT (UTC−5)
ZIP Codes: 60502–60507, 60568, 60569, 60572, 60598
Area codes: 630, 331
FIPS code: 17-03012
GNIS feature ID: 2394031
Demonym: Auroran
Wikimedia Commons: Aurora, Illinois
Website: [www.aurora-il.org]
Official Website: https://www.aurora-il.org
Wikidata description: city in Kane County, Illinois, United States
Wikidata id: Q22595
Wikidata label: Aurora
Wikidata aliases: Array
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