David Bremner Henderson (March 14, 1840 – February 25, 1906), a ten-term Republican Congressman from Dubuque, Iowa, was the Speaker of the United States House of Representatives from 1899 to 1903. He was the first Congressman from west of the Mississippi River, the last Civil War veteran, the second foreign-born person (after Charles Frederick Crisp), and so far the only Iowan to serve as Speaker.