Londonderry Township is a township in Chester County, Pennsylvania, United States. The population was 2,149 at the 2010 census.

St. Malachi Church is a historic Irish Roman Catholic mission church on St. Malachi Road in rural Londonderry Township, Chester County, Pennsylvania. It is a mission of Our Lady of Consolation of Parkesburg. The church with its adjoining cemetery was added to the National Register of Historic Places (NRHP) in 1985.