Plymouth Township is a township with home rule status in Montgomery County, Pennsylvania. The township has been governed by a home rule charter since 1976 and is no longer subject to the Pennsylvania Township Code. The population was 16,525 at the 2010 census. It is serviced by the Colonial School District and is home to the Plymouth Meeting Mall.

Montgomery County, colloquially referred to as Montco, is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population of the county was 856,553, making it the third-most populous county in Pennsylvania after Philadelphia and Allegheny counties. The county is part of the Southeast Pennsylvania region of the state.