Sunbury is a village in Delaware County, Ohio, United States. The population was 4,389 at the 2010 census. The village is centered around a New England-styled traditional town square with the historic village hall located in the center of a village green. The village is home to a major American Showa manufacturing facility, which manufactures automotive parts for Honda of America. Sunbury is located north of Galena, to which it has provided services such as police, although police are now no longer provided due to a cut in Galena's budget. Law enforcement is currently provided by a county sheriff. Sunbury is also east of Delaware.