The Pine Grove Cemetery, also known as the First Meetinghouse Burying Ground, is an historic cemetery on Tremaine and Main Streets in Leominster, Massachusetts. Established in 1742, it is the city's oldest cemetery, and the principal surviving element of the town's early settlement. It was originally located adjacent to the community's first meeting house, built in 1741 and dismantled in 1774. The cemetery, closed to burials since 1937, was listed on the National Register of Historic Places on March 12, 2008.