Ninh Thuận is a coastal province in the southernmost part of the South Central Coast region, the Central of Vietnam. It borders Khánh Hòa to the north, Bình Thuận to the south, Lâm Đồng to the west and the East Sea to the east.

In Vietnam, South Central Coast and South Central Region are two terms which can refer to the same region or two regions that do not correspond to each other. South Central Coast consists of the independent municipality of Đà Nẵng and seven other provinces, which means South Central Coast doesn't include Central Highlands. Nevertheless, the term "South Central Region" can also be used to include Central Highlands as it is part of southern part of Central Vietnam.