Praseodymium oxyiodide or praseodymium oxide iodide is an inorganic compound of praseodymium, oxygen, and iodine with the chemical formula .
PrOI can be synthesized by reacting praseodymium triiodide () with oxygen at a controlled partial pressure.
Alternatively, PrOI can form as a decomposition product of praseodymium diiodide in the presence of moisture, or through the reaction of with praseodymium oxide ().