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Kane County Illinois Last Updated: 08/23/2026 |
| Kane County is a county located in the state of Illinois, United States. According to the 2020 census, the county had a population of 516,522. The county seat is Geneva, and the largest city is Aurora. Kane County's most prominent natural feature is the Fox River. | |
| The Fox River originates in southern Wisconsin and flows through a rocky riverbed from Clinton to a distance below the southern boundary of the Kane River in Kendall County. | |