1st Division (South Vietnam)

1st Division
Sư đoàn 1
1st Division SSI
Founded	1955
Disbanded	1975
Country	South Vietnam
Branch	Army of the Republic of Vietnam
Role	Infantry
Part of	I Corps
Garrison/HQ	Huế
Engagements	Vietnam War Operation Lam Son 289 Operation Lam Son 54 Battle of Hue Battle of Quang Tri (1968) Operation Somerset Plain Operation Vinh Loc Operation Maine Crag Operation Lam Son 719 Easter Offensive Battle of Thượng Đức Battle of Phú Lộc Battle of Huế Hue–Da Nang Campaign
Commanders
Notable commanders	Nguyễn Khánh Tôn Thất Đính Nguyễn Văn Thiệu Đỗ Cao Trí Nguyễn Chánh Thi Nguyễn Văn Chuân Phan Xuân Nhuận Ngô Quang Trưởng Phạm Văn Phú

The 1st Division of the Army of the Republic of Vietnam (ARVN)—the army of the nation state of South Vietnam that existed from 1955 to 1975—was part of the I Corps that oversaw the northernmost region of South Vietnam, the centre of Vietnam.

The 1st Division was based in Huế, the old imperial city and one of two major cities in the region, which was also the corps headquarters. Until late 1971 the division was also tasked with the defence of Quảng Trị, the closest town to the Vietnamese Demilitarized Zone (VDMZ) and among the first to be hit by the Tet Offensive.