William Parmenter (March 30, 1789 – February 25, 1866) was a United States representative from Massachusetts. He was born in Boston on March 30, 1789. He attended the city's public schools, including the Boston Latin School. He was a member of the Massachusetts House of Representatives in 1829, served in the Massachusetts State Senate in 1836 and was a Cambridge selectman in 1836. He was manager and agent of the New England Crown Glass Co., and president of the Middlesex Bank. Parmenter was elected as a Democrat to the Twenty-fifth and to the three succeeding Congresses (March 4, 1837 – March 3, 1845), serving as chairman of the Committee on Naval Affairs in the Twenty-eighth Congress. He also served as a naval officer at the port of Boston 1845–1849. He died in East Cambridge, Massachusetts on February 25, 1866. His interment was in Cambridge Cemetery.