William S. Holabird (c. 1794 – May 20, 1855) was an American lawyer, politician and the 37th Lieutenant Governor of Connecticut.
In 1831 and 1833 he was unsuccessful as a Democratic candidate for Congress and was appointed by Andrew Jackson in 1834 as U.S. Attorney for the District of Connecticut.
Cleveland was succeeded as governor in 1844 by Roger S. Baldwin from the Whig party.
Baldwin was known for his defence in the Amistad Case, where Holabird had been the government's attorney.
William S. Holabird died at Winchester, Litchfield County, Connecticut, on May 20, 1855.