 To the southeast it borders the provinces of Banteay Meanchey and Oddar Meancheay of Cambodia.The Sankamphaeng Range mountainous area is in the southern section of this district.The Lahan Sai District's motto is "The Lung Pu Suk so sacred, city of horticulture and farm plants, many of silk, beautiful of Hin-Lum (Rock hole), many of river basin, Lanan Sai is border city."