Henning Leo (1885–1953) was a Swedish social democrat politician and the secretary of the Union of Railroad Engineers.

[1] In 1918 he was elected to the Riksdag representing Kronoberg County and remained as a board member of the Social Democratic Party until 1940.

[1] In 1926 he was made the secretary of its socialization committee replacing Nils Karleby in the post.

[1] In 1932 he was appointed minister of communications (Transport) to the cabinet led by Prime Minister Per Albin Hansson and remained in the office until 1936.

[1] This article about a Swedish Social Democratic Party politician is a stub.