William Bradbury Small (May 17, 1817 – April 7, 1878) was a U.S. Representative from New Hampshire.

Born in Limington in Massachusetts' District of Maine, Small moved with his parents to Ossipee, New Hampshire.

He studied law and was admitted to the bar in 1846, commencing practice in Newmarket, New Hampshire, and serving as solicitor of Rockingham County.

He died in Newmarket, New Hampshire, April 7, 1878, and was interred in Riverside Cemetery.

This article incorporates public domain material from the Biographical Directory of the United States Congress