John Huy Addams (July 12, 1822 – August 17, 1881) was a politician and businessman from the U.S. state of Illinois. Addams was born in Pennsylvania in 1822, where he married Sarah Weber (1817–1863). In 1844 the couple moved to Cedarville, Illinois and he purchased the Cedar Creek Mill. Addams quickly became a successful businessman working as a director for two railroad companies and a bank president. He constructed a prominent Federal style home in 1854 which still stands today. He and his wife Sarah (Weber) Addams had nine children, including Alice Haldeman and social activist Jane Addams.