John Sherman (May 10, 1823-October 22, 1900) was a Senator from Ohio and a member of the United States Cabinet.
He was born in Lancaster, Ohio, and was the younger brother of the American Civil War general William Tecumseh Sherman. His father became a judge of the Ohio Supreme Court about the time he was born, but died when John was only six years old.
Before entering politics, he practiced law, studying under an older brother and joining him as a partner in 1844. In 1848 he married a judge's daughter, Margaret Sarah Stewart. In 1848 he served as a delegate to the Whig convention that nominated Zachary Taylor for President. In 1852 he again served as a convention delegate, at the Baltimore convention that nominated Winfield Scott. He served in the House of Representatives from 1855 to 1861.
He sought the Republican nomination for the Presidency in 1880, hoping to become a compromise candidate between Ulysses S. Grant, who was being promoted for a third term, and James G. Blaine. However, his campaign manager, Representative and Senator-elect James A. Garfield, received the nomination instead. Sherman returned to the Senate, taking the seat to which the Ohio legislature had originally elected Garfield, replacing Allen G. Thurman, in 1881, serving until 1897, when he resigned once more to join the Cabinet.
He died in Washington, D.C.
Sherman is best known for the Sherman Antitrust Act, of which he was the chief author.