Harold Eugene Saunders (1890–1961), was the leading hydrodynamicist in the United States in the mid 20th century.
He spent much of his career at the Portsmouth, New Hampshire Navy yard, engaged in submarine design and construction.
In 1927-28 he was salvage officer in charge of raising the submarine S-4 which sank off Cape Cod following a collision.
The NSWCCD Maneuvering and Seakeeping Basin (MASK), completed in 1963, is dedicated to Saunders.
The American Society of Naval Engineers presents the annual Harold E. Saunders award in his honor.