William Bainbridge Renshaw (October 11, 1816 – January 1, 1863) was an officer in the United States Navy during the American Civil War.

His father, Commodore James Renshaw, had served with William Bainbridge, and subsequently named his son for the naval hero.

He was appointed commander on April 26, 1861, during the early days of the Civil War.

Renshaw was attached to Admiral David Farragut's squadron for most of the war and was commended for the "handsome manner in which he managed his vessel", Westfield, during Mortar Flotilla operations on the Mississippi River in 1862.

On January 1, 1863, during the Second Battle of Galveston, Renshaw refused to surrender his flagship.