A-class submarine may refer to one of these classes of submarine:
, a class of 13 submarines of the Royal Navy that served in World War I , a class of six built for the Royal Danish Navy, 1911–1914 , a class built for the Royal Norwegian Navy in 1913 , also later known as Soviet A-class submarine, submarines launched in 1916 Spanish A-class submarine, three s built for the Spanish Navy and launched in 1917 , a class of seven US Navy submarines built before World War I; also known as the "A class" (also called the Archeron class), a class of sixteen submarines of the Royal Navy that served in World War II; also known as the "A class" The Japanese Type A submarine, three classes submarines: I-9-class submarine (Type A1 submarine) I-12-class submarine (Type A2 submarine) I-13-class submarine (Type AM submarine)