The 52nd Ranger Battalion was a ranger battalion of the Army of the Republic of Vietnam (ARVN) during the Vietnam War. To form the battalion, the 347th, 348th, 351st and 352nd independent ranger companies amalgamated in early 1964, at My Tho. Its commanding officer was Captain Vong Si Dau.
On 11 November 1965, the battalion was augmented to the US 11th Armored Cavalry Regiment and conducted an air assault to relief a US element of the 11th ACR that had been ambushed by the VC 275th Regiment near Kim Hai hamlet, in the village of Phuoc Hoa on Route 15, in Phuoc Tuy Province and received a United States Presidential Unit Citation.
The battalion ceased to exist after the fall of Saigon on 30 April 1975.