Sainyabuli Province

Sainyabuli (Lao ໄຊຍະບູລີ; ; alternate spellings: Xaignabouri, Xayaboury, Sayabouli, Sayabouri) is a province of Laos, located in the northwest of the country. Sainyabuli Province covers an area of . The province borders Bokeo Province and Oudomxai Province to the north, Luang Prabang Province and Vientiane Province to the east, and (from the south clockwise) the Thai provinces Loei, Phitsanulok, Uttaradit, Nan and Phayao.