Long Xuyen, city, southwestern Vietnam. It is located on the west bank of the Hau Giang (Bassac) River, a channel of the Mekong River. Fishing, the breeding of fish, and rice and fruit growing are major occupations near Long Xuyen. The city is connected by road to Can Tho and Chau Doc. Pop. (1999) 191,456; (2009) 245,699.