Nongkhai is top of Northereast's Thailand, Far 615 km. from Bangkok and 54 km. from Udonthani. Nongkhai is where Highway 2 (Also known as Mittaphap Highway, Friendship Highway and Asia 12) ends, at the Thai-Lao Friendship Bridge over the Maekhong River (Internation river). Across the river is the Lao People's Democratic Republic. Nongkhai is only 24 km. from Vientiane opposite Tha-Dua on the other side at Ampher Sri-Chiangmai.

       Nongkhai has 13 Aumphers and 4 Semi-Aumphers (we called "Ging-aumpher"), estimated 7,332.3 square km. And has an average elevation of 365 m. above sea level.