廊开府（泰文名称：หนองคาย；英文名称：Nong Khai）为泰国东部之一个府。

该府原名为「曼派村」，原属老挝的「万象城」统治。拉玛皇朝时代，该村及万象城被暹罗入侵占据，暹罗人于1827年创建起防御城池，命名为「廊开府」，并管辖「万象城」（今老挝万象）。直至1893年，暹罗才与法国按照中止纠纷协约，割去「万象城」给法国。

Nong Khai (เทศบาลเมืองหนองคาย, Thesaban Mueang Nong Khai (Nong Khai Town) or หนองคาย or Nong Khai) is a city in north-east Thailand. It is the capital of Nong Khai Province. Nong Khai city is administered as Amphoe Mueang Nong Khai.

Nong Khai lies on the Mekong River, near the site of the first Thai-Lao Friendship Bridge, spanning the river to Laos. The Thai-Lao Friendship bridge was largely funded by a gift to the Lao government from the Australian government. It is the road and railway gateway to Laos's capital, Vientiane, 25 kilometers upriver, on the north bank opposite the Thai town of Sri Chiang Mai. Construction of a rail spur to Thanaleng outside of Vientiane was begun early-2007 and officially opened 5 March 2009.