Magnus Johnson (September 19, 1871 – September 13, 1936) was an American farmer and politician. He served in the United States Senate and United States House of Representatives from Minnesota as a member of the Farmer–Labor Party. Johnson was born near Karlstad, Sweden, and his family moved to La Crosse, Wisconsin, United States, in 1891. (Johnson is the only Swedish-born person to serve in the U.S.