The 628th Tank Battalion was an armored battalion of the United States Army active during the Cold War, formed in 1946 and merged into the 103rd Armor Regiment in 1959. It was formed in May 1946 in the Pennsylvania National Guard by redesignating the 628th Tank Destroyer Battalion, then organized in May 1949 as part of the 28th Infantry Division. In 1959, under the new Combat Arms Regimental System, the battalion joined with elements of the 110th Infantry Regiment and the and to form the 103rd Armor Regiment.