The Battle of Hanover took place on June 30, 1863, in Hanover in southwestern York County, Pennsylvania, as part of the Gettysburg Campaign of the American Civil War.

Hanover is a borough in York County, Pennsylvania, United States. The population was 16,429 at the 2020 census. Located 19 miles (31 km) southwest of York and 54 miles (87 km) north-northwest of Baltimore, Maryland, the town is situated in a productive agricultural region. It is named after the German city of Hanover and is a principal city of the York–Hanover metropolitan area.