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is a city in Kendall County, Illinois, United States. The population was 6,189 at the 2000 census, and estimated to be 10,791 as of 2005. It is the county seat of Kendall County. Yorkville is located in the center of Kendall County, the fastest growing county in Illinois and the third fastest in the United States.
The ZIP code is 60560. The area code is (630).
According to the United States Census Bureau, the city has a total area of 7.2 square miles (18.5 km²), of which, 7.0 square miles (18.2 km²) of it is land and 0.1 square miles (0.3 km²) of it (1.54%) is water.
The Fox River runs straight through Yorkville. It is located in both Bristol and Kendall Townships.