List of cruisers of World War II

The heavy cruiser was designed for long range, high speed, and heavy calibre naval guns. The first heavy cruisers were built in 1915, although it only became a widespread classification following the London Naval Treaty in 1930. The heavy cruiser's immediate precursors were the light cruiser designs of the 1910s and 1920s; the US 8-inch 'treaty cruisers' of the 1920s were originally classed as light cruisers until the London Treaty forced their redesignation. Heavy cruisers continued in use until after World War II.

The German Deutschland class was a series of three Panzerschiffe ("armored ships"), a form of heavily armed cruiser, built by the German Reichsmarine in nominal accordance with restrictions imposed by the Treaty of Versailles. The class is named after the first ship of this class to be completed (Deutschland). All three ships were launched between 1931 and 1934, and served with Germany's Kriegsmarine during World War II. During the war, they were reclassified as heavy cruisers.

The British press began referring to the vessels as pocket battleships, in reference to the heavy firepower contained in the relatively small vessels; they were considerably smaller than contemporary battleships, though at 28 knots, were slower than battlecruisers. And although their displacement and scale of armor protection was that of a heavy cruiser, they were armed with guns larger than the heavy cruisers of other nations. Deutschland-class ships continue to be called pocket battleships in some circles. The development of the anti-aircraft cruiser began in 1935 when the Royal Navy re-armed HMS Coventry and HMS Curlew. Torpedo tubes and 6-inch (152 mm) low-angle guns were removed from these World War I light cruisers and replaced by ten 4-inch (102 mm) high-angle guns with appropriate fire-control equipment to provide larger warships with protection against high-altitude bombers.^[1]

A tactical shortcoming was recognized after completing six additional conversions of C-class cruisers. Having sacrificed anti-ship weapons for anti-aircraft armament, the converted anti-aircraft cruisers might need protection themselves against surface units. New construction was undertaken to create cruisers of similar speed and displacement with dual-purpose guns. Dual-purpose guns offered good anti-aircraft protection with anti-surface capability for the traditional light cruiser role of defending capital ships from destroyers. The first purpose built anti-aircraft cruiser was the British Dido class, completed shortly before the beginning of World War II. The US Navy Atlanta-class anti-aircraft cruisers (CLAA) were designed to match capabilities of the Royal Navy. Both Dido and Atlanta carried torpedo tubes.

The quick-firing dual-purpose gun anti-aircraft cruiser concept was embraced in several designs completed too late to see combat including USS Worcester and USS Roanoke completed in 1948 and 1949, two De Zeven Provinciën-class cruisers completed in 1953, De Grasse and Colbert completed in 1955 and 1959, and HMS Tiger, HMS Lion and HMS Blake completed between 1959 and 1961.^[2]

The List of ships of World War II contains major military vessels of the war, arranged alphabetically and by type. The list includes armed vessels that served during the war and in the immediate aftermath, inclusive of localized ongoing combat operations, garrison surrenders, post-surrender occupation, colony re-occupation, troop and prisoner repatriation, to the end of 1945. For smaller vessels, see also List of World War II ships of less than 1000 tons. Some uncompleted Axis ships are included, out of historic interest. Ships are designated to the country under which they operated for the longest period of the World War II, regardless of where they were built or previous service history.