John Peter Altgeld (December 30, 1847 – March 12, 1902) was an American politician and the 20th Governor of Illinois, serving from 1893 until 1897. He was the first Democrat to govern that state since the 1850s. A leading figure of the Progressive movement, Altgeld signed workplace safety and child labor laws, pardoned three of the men convicted in the Haymarket Affair, and rejected calls in 1894 to break up the Pullman strike by force.