Yorkville (officially the United City of Yorkville) is a city in Kendall County, Illinois, United States. The population was 16,921 at the 2010 census and was estimated at 20,613 as of 1 July 2019. It is the county seat of Kendall County.
In 1836, the city of Yorkville was settled by early pioneers. Originally, the city's main thoroughfare of Bridge Street was designed for horse-drawn carriages and pedestrians. As time passed, Hydraulic Street, which runs parallel to the Fox River, boasted a trolley that ran from Ottawa to Aurora. This part is now operated by the Illinois Railway.
At the time, Yorkville's central business district was on the south side of the Fox River and the public square was north of the river, a layout unique to the region. The public gathering place was near the river's edge. The Kendall County Courthouse was next to the downtown commercial district. Many of the city's remaining historic single-family homes are within walking distance of Bridge Street, the courthouse and Union Hall.