Daniel Baugh Brewster Jr. (November 23, 1923 – August 19, 2007) was an American politician serving as a Democratic member of the United States Senate, representing the State of Maryland from 1963 until 1969. He was also a member of the Maryland House of Delegates from 1950 to 1958, and a representative from the 2nd congressional district of Maryland in the United States House of Representatives from 1959 to 1963.