William Henry Lamport (May 27, 1811 – July 21, 1891) was a U.S. Representative from New York.
Born in Brunswick, New York, Lamport moved with his parents to Gorham, New York in 1826. He attended the public schools. He engaged in agricultural pursuits. Supervisor of Gorham in 1848 and 1849. Sheriff of Ontario County 1850–1853. He was a member of the New York State Assembly (Ontario Co., 1st D.) in 1855. He moved to Canandaigua in 1864. He served as president of the village of Canandaigua in 1866 and 1867.
Lamport was elected as a Republican to the Forty-second and Forty-third Congresses (March 4, 1871 – March 3, 1875). He was not a candidate for renomination in 1874. He retired to Canandaigua, New York, where he died July 21, 1891. He was interred in the West Avenue Cemetery.