Mongkol Borey District (Khmer: ស្រុកមង្គលបូរី; Thai: มงคลบุรี, rtgs: Mongkhon Buri, pronounced [mōŋ.kʰōn būrīː], "Auspicious City") is a district (srok) in the south of Banteay Meanchey Province, in north-western Cambodia. The district capital is Mongkol Borey town located around 9 kilometres south of the provincial capital of Sisophon by road. Mongkol Borey District is the southernmost district of Banteay Meanchey. The district shares a border with Battambang Province to the south.