Sønner av Norge (originally Sønner af Norge, literally "Sons of Norway") is the common title of the anthem Norsk Nationalsang (literally, "Norwegian National Anthem"), which was the de facto national anthem of Norway from 1820 until the early 20th century. From the mid-1860s, Ja, vi elsker dette landet gradually came to occupy the unofficial position as national anthem, but was used alongside Sønner af Norge until the early 20th century, with Sønner af Norge being preferred in official situations.
The anthem was written by Henrik Anker Bjerregaard (1792–1842) and the melody by Christian Blom (1782–1861), after Det Kongelige Selskap for Norges Vel had announced a competition to write a national anthem for Norway in 1819. Norsk Nationalsang (Sønner af Norge) was announced as the winner.