The Cleveland class was a group of light cruisers built for the U.S. Navy during World War II. They were the most numerous class of light cruisers ever built. Fifty-two were ordered, and 36 were completed, 27 as cruisers and nine as light aircraft carriers. They were deactivated within a few years after the end of the war, but six were converted into missile ships, and some of these served into the 1970s. One ship of the class remains as a museum ship.

A light cruiser is a type of small or medium-sized warship. The term is a shortening of the phrase "light armored cruiser", describing a small ship that carried armor in the same way as an armored cruiser: a protective belt and deck. Prior to this smaller cruisers had been of the protected cruiser model, possessing armored decks only. While lighter and smaller than other contemporary ships they were still true cruisers, retaining the extended radius of action and self-sufficiency to act independently around the world. Cruisers mounting larger guns and heavier armor relative to most light cruisers would come to be known as heavy cruisers, though the designation of 'light' versus 'heavy' cruisers would vary somewhat between navies. Through their history light cruisers served in a variety of roles, primarily as convoy escorts and destroyer command ships, but also as scouts and fleet support vessels for battle fleets.