Greenfield Township is a township in Lackawanna County, Pennsylvania, United States. The population was 2,105 at the 2010 census. It is one of the five municipalities comprised by the Lakeland School District. Township government consists of a board of Supervisors. Meetings are held at the township Municipal Hall, which is located at 424 Route 106, just south of Our Mother of Sorrows cemetery on Finch Hill corners.
Greenfield Township was formed in January 1816 from a northern portion of Abington Township, at the time located in Luzerne County.