Plantsville is a neighborhood in the town of Southington, Hartford County, Connecticut, United States. It is centered at the merger between South Main Street and West Main Street. As of the 2000 Census there were 10,387 people living in the Zip Code Tabulation Area for zip code 06479, which is assigned the postal city name Plantsville. The Zip Code Tabulation Area includes the entire southwestern corner of the town of Southington, including Marion and Milldale. Beginning in 2015 Plantsville was listed as a census-designated place.