Commodore John Thomas Newton (20 May 1793 – 28 July 1857) was an officer in the United States Navy. Born in Alexandria, Virginia, Newton commanded Beagle on her maiden voyage to the Caribbean. Newton was in command of Missouri during her historic crossing of the Atlantic, the first by a steam-power vessel. As commodore, he commanded the Home Squadron from March 1852 until March 1855. Newton died in Washington, D.C., aged 64.