The VC 275th Regiment, also known as the 275 Viet Cong Main Force Regiment, was a regiment of the Viet Cong during the Vietnam War. The regiment was formed in May 1965. The 275th Regiment was part of the VC Division 5 and operated in the Phước Tuy province now known as the province of Ba Ria-Vung Tau. On 11 November 1965, the Regiment ambushed the ARVN 52nd Rangers near Nui Thi Vai, in Phước Tuy province and inflicted heavy casualties upon the ranger battalion. The 275 Regiment took later part in the attack on Svay Rieng city on 11 August 1974.