Houayxay

 ( Laos–thailand Border Crossings ) 

Houayxay (, ; , ) (also Huoeisay, Huai Sai, Houei Sai, Huay Xay or Huay Xai) is a district in Bokeo Province, Laos, on the border with Thailand.

The town lies on the Mekong River opposite Chiang Khong in Thailand. The Fourth Thai-Lao Friendship Bridge at Ban Houayxay, which opened in December 2013 and replaced ferry service across the river, is the northernmost road border crossing between the two countries. Asian Highway 3, which runs through Ban Houayxay, extends north to Yunnan Province of China and south to Chiang Rai Province of Thailand.

Houayxay has a domestic airport (HOE) with regular flights to Vientiane and Luang Prabang (depending on the season).

The town is the starting point for boats (speed and slow boats, freighters, luxury cruisers for tourists and others) on the Mekong to Pakbeng, Luang Prabang and other destinations.

Houayxay is home to the Gibbon Experience. It is a series of ziplines and treehouses providing an overnight experience.

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