Orsamus R. Cole (August 23, 1819 – May 5, 1903) was an American lawyer and judge. He served as the 6th Chief Justice of the Wisconsin Supreme Court, and, until 2013, was the longest-serving justice in the Court's history, with nearly 37 years on the high court. He also represented Wisconsin's 2nd congressional district in the U.S. House of Representatives for the 31st Congress (1849–1850). His name is frequently misspelled as Orasmus.