Harry Nelson Routzohn (November 4, 1881 – April 14, 1953) was an attorney, jurist and member of the United States House of Representatives from Ohio for one term from 1939 to 1941.

Routzohn announced that he would start a movement in behalf of Herbert Hoover in the Third Ohio District on the grounds that the State Committee usurped authority in endorsing Willis to the exclusion of all others.

In 1930, he was appointed assistant United States district attorney by President Hoover and served until the election of Roosevelt in 1932.

After 1932, he returned to private practice, and became associate counsel of the Brotherhood of Carpenters, of the American Federation of Labor (AFL).

He was aligned closely with the isolationist, conservative wing of the Republican party and was a reliable vote against New Deal legislation.

On the one hand his sympathies clearly lay with labor because of his long service as AFL counsel, and so was thought unlikely to support amendments that would weaken the protection of unionization of the Wagner Act.

On the other hand, he had shown little sympathy with the Roosevelt administration's method of dealing with labor problems and, as a former AFL attorney, he was likely to probe charges of CIO favoritism on the part of the board.

Future NLRB Judge Fannie M. Boyls, a 1929 graduate of the University of Texas School of Law, was one of several female Review Section attorneys called to testify before the Smith Committee by its general counsel, Edmund M. Toland.

Congressman Clare Eugene Hoffman of Michigan ridiculed them on the floor of the House—not the last time such attitudes would be exhibited in Congress: Those girls who are acting as reviewing attorneys for the Board are fine young ladies.

Harry Routzohn had been the Labor Department's chief legal officer for a month when he suffered an attack and was taken to George Washington University Hospital where he died five days later of a heart ailment.