Co-Co

Co-Co may refer to:


 * Co-Co locomotive, a classification for a locomotive wheel arrangement with two six-wheeled bogies with all axles powered, with a separate motor per axle
 * Co-Co (band), a British pop group
 * "Co-Co" (Sweet song), 1971
 * Co-co! Magazine, a Hong Kong magazine
 * Abbreviation for Contingent convertible bond