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.

York County is a county in the Commonwealth of Pennsylvania, United States. As of the 2020 census, the population was 456,438. Its county seat is York. The county was created on August 19, 1749, from part of Lancaster County and named either after the Duke of York, an early patron of the Penn family, or for the city and county of York in England. The county is part of the South Central region of the state.