Dag Rønnebu (born 1961) is a Norwegian blacksmith from Nordland county of Norway.
He attended the gymnasium of Fauske and HiB and was educated as a teacher. From the age of 20 he taught himself the art of blacksmithing, he is considered one of the finest blacksmiths of Norway and has delivered works to HRH crownprince Håkon of Norway and the Norwegian army.He also delivers works to the treeboat industry of Nordland.