Margaret Scarsdale is a Democratic member of the Massachusetts House of Representatives, representing the 1st Middlesex district since January 18, 2023. She succeeded Sheila Harrington, who resigned in February 2022 to become a court magistrate in the Gardner District Court. Scarsdale won the seat in the November 2022 general election against Republican Andrew Shepherd and independent Cathy Lundeen, a result confirmed following a recount, court challenge, and special legislative committee review.