USS Connecticut (BB-18), the fourth United States Navy ship to be named after the state of Connecticut, was the lead ship of her class of six pre-dreadnought battleships. Her keel was laid on 10 March 1903; launched on 29 September 1904, Connecticut was commissioned on 29 September 1906, as the most advanced ship in the US Navy.

The Connecticut class of pre-dreadnought battleships were the penultimate class of the type built for the United States Navy. The class comprised six ships: Connecticut, Louisiana, Vermont, Kansas, Minnesota, and New Hampshire, which were built between 1903 and 1908. The ships were armed with a mixed offensive battery of 12-inch (305 mm), 8-inch (203 mm), and 7-inch (178 mm) guns. This arrangement was rendered obsolete by the advent of all-big-gun battleships like the British HMS Dreadnought, which was completed before most of the Connecticuts entered service.