Zionsville is a suburban town located in the extreme southeast area of Boone County, Indiana, United States, in Eagle Township, northwest of Indianapolis. The population was 14,160 at the 2010 census, and grew to 26,784 in the Census 2016 estimates.Zionsville promotes itself as a tourist attraction, centered around its village-styled downtown area. This area primarily consists of Main Street, paved entirely in brick, which is lined with small retail stores and restaurants.HistoryZionsville was laid out in 1852 when the railroad was extended to that point. It was named for William Zion, a pioneer settler.Abraham Lincoln made a whistle-stop speech in Zionsville in 1861 when traveling to his inauguration.Town Hall (Castle Hall) was listed on the National Register of Historic Places in 1983.GeographyZionsville is located at, approximately 15mi northwest of Downtown Indianapolis. According to the 2010 census, Zionsville has a total area of 10.298sqmi, of which 10.26sqmi is land and 0.038sqmi is water.Zionsville annexed 39.5sqmi of land after the 2010 Census, bringing the current area of the town to 49.7sqmi and adding 9,159 residents.