Populated places in Sainyabuli province

Sainyabuli, (; alternatively spelled Sayaboury, Xaignabouli, Xayaburi, or Xayaboury) is the capital of Sainyabuli Province, Laos. It lies on Route 4 which along with Route 13 connects it to Luang Prabang, roughly 80 kilometres northeast by road and to the Thai border across the Luang Prabang Range in the southwest. Sainyabuli Airport lies southwest of the town.

Hongsa (, ) is a town in northwestern Laos. It is in Hongsa District in Sainyabuli Province. The town is northwest of the provincial capital Sainyabuli. Nearby Ban Viengkeo is a rotating host to a major elephant festival. The district is the site of the Hongsa coal-fired power plant that began operation in 2015.