Orlando Harrison Manning (May 18, 1847 – September 19, 1909) was an American politician.
Born in Abington, Indiana, Manning moved with his family to Iowa.
Manning served in the Iowa House of Representatives 1876-1880 and as Lieutenant Governor of Iowa 1882–1886 serving under Governor Buren R. Sherman.
Later he practiced law in Denver, Colorado, Topeka, Kansas, Chicago, Illinois, and New York City.
This article about an Iowa politician is a stub.