William Benjamin Baker (July 22, 1840-May 17, 1911) was a U.S. Congressman who represented the second Congressional district of Maryland from 1918 to 1921.
Baker was born near Aberdeen, Maryland and attended the common schools. He engaged in agricultural pursuits until 1872, when he became interested in the canning industry, and later in banking. He served as a delegate to several State and congressional conventions, and was a member of the Maryland House of Delegates in 1881. He also served in the Maryland State Senate in 1893.
Baker was elected as a Republican to the Fifty-fourth, Fifty-fifth, and Fifty-sixth Congresses, serving from March 4, 1895 to March 3, 1901. He was not a candidate for renomination in 1900, and resumed the canning business. He died in Aberdeen in 1911, and is interred in Bakerâ€™s Cemetery.