|Capital:||Ban Mouang Cha|
|Inhabitants:||70,600 (2004 est)|
|Pop. density:||10 inh./km²|
Xaisomboun (also Saysomboun, Lao ໄຊສົມບູນ) is a special zone (khetphiset) of Laos, located in the north of the country, near the capital Vientiane. The special zone was created 1994 with area split off from the provinces Vientiane, and Xiangkhoang.