Southbury is a town in western New Haven County, Connecticut, United States. It is north of Oxford and Newtown, and east of Brookfield. Its population was 19,879 at the 2020 census. The town is part of the Naugatuck Valley Planning Region. Southbury comprises sprawling rural country areas, suburban neighborhoods, and historic districts. It is a short distance from major business and commercial centers. It is 67 miles north of New York City, and 34 miles west of Hartford. From Wikipedia