William Hayden Needham (December 9, 1810 – September 29, 1874) was a Canadian lawyer and political figure in New Brunswick.
He represented the City of Saint John from 1850 to 1854 and York County from 1865 to 1866 and from 1869 to 1870 in the Legislative Assembly of New Brunswick.
He was born in Fredericton, New Brunswick, the son of Mark D. Needham, and was educated at King's College (later the University of New Brunswick).
He studied law with George Frederick Street, was called to the bar in 1834 and practiced in Woodstock, Fredericton, and Saint John.
Needham married Mary Ann Gale in 1835.