Thừa Thiên Huế is a southernmost coastal province in the North Central Coast region, the Central of Vietnam, approximately in the center of the country. It borders Quảng Trị to the north, Quảng Nam and Đà Nẵng to the south, Salavan of Laos to the west and the East Sea to the east.

Quảng Trị is a coastal province near the southernmost part of the North Central Coast region, the Central of Vietnam, north of the former imperial capital of Huế. It borders Quảng Bình to the north, Thừa Thiên Huế to the south, Savannakhet of Laos to the west and the East Sea to the east, with 75 kilometres (47 mi) of coast.