Cairell mac Muiredaig Muinderg (died 532) also Cairell Coscrach ("victorious") was a king of Ulaid from the Dal Fiatach. He was the son of Muiredach Muinderg mac Forggo (died 489) and brother of Eochaid mac Muiredaig Muinderg (died 509), previous kings. His accession date is given in the Annals of Tigernach in 509 and the accession of his successor in 532 This annal gives him a reign of 509-532