Derriopos or Deuriopus was a subdivision of Paionia, in what is today North Macedonia. Its exact limits are unclear, but it is known that it contained lands around the river Crna. The towns Bryanium and Styberra were located in Derriopos. Livy describes Derriopos as a region of Paionia, but also locates the Derriopian city of Styberra in Pelagonia. Pelagonia was used as a name for the westernmost part of Paionia, while the north-westernmost part of Pelagonia was referred to as Derriopos. According to Livy, Philip V of Macedon founded the city of Perseis in Derriopos, named after his eldest son, Perseus.