Manheim Township is a township in Lancaster County, Pennsylvania, United States. It was established in 1729. The township's southernmost border meets the city limits of Lancaster and includes the communities of Neffsville, Dillerville, and Landis Valley. Its population, as of the 2020 census, was 43,977 making it the second largest municipality in the county after Lancaster City.

Lancaster County, sometimes nicknamed the Garden Spot of America or Pennsylvania Dutch Country, is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 552,984, making it Pennsylvania's sixth-most populous county. Its county seat is also Lancaster. Lancaster County comprises the Lancaster metropolitan statistical area. The county is part of the South Central region of the state.