Michael E. "Mike" McMahon (born September 12, 1957) is the former U.S. Representative for New York's 13th congressional district, serving from 2009 until 2011. He is a member of the Democratic Party. He was previously a member of the New York City Council.
The district includes all of Staten Island, plus all or part of the Gravesend, Bay Ridge, Bensonhurst and Dyker Heights neighborhoods in Brooklyn. He was defeated for re-election in 2010.
McMahon is a lifelong resident of Staten Island. He is of German and Irish heritage. He grew up in the Stapleton neighborhood on the North Shore and attended parochial schools. He graduated from New York University in 1979, later obtaining a law degree from New York Law School. He then worked for Democratic State Assembly members Eric Vitaliano and Elizabeth Connelly. He joined the staff of City Councilman Jerome X. O'Donovan, whom he succeeded in the Council. Prior to being elected to public office, McMahon worked as a partner at O'Leary, McMahon & Spero in Staten Island.