Rube Ferns (born James Ferns; October 30, 1873 – June 11, 1952) was an American boxer of the early 20th century. Nicknamed "The Kansas Rube", he held the world welterweight championship in 1900 and 1901. He was formidable and scrappy with a good punch. He defeated such men as "Mysterious" Billy Smith, Eddie Connolly, Bobby Dobbs, William "Matty" Matthews, Frank Erne, Owen Zeigler, "Scaldy" Bill Quinn, Harry Pigeon, Frank "Dutch" Neal, Paddy Purtell and Shorty Ahearn. He lost his title to Barbados Joe Walcott in December 1901.