Norddal was established as a municipality on 1 January 1838 (see formannskapsdistrikt). Sunnylven was separated from Norddal the fall of 1838. Norddal covers an area with several distinct valleys and villages: Eidsdal, Norddal (Dalsbygda), Tafjord, Fjørå/Selboskarbygda, and Valldal, the administrative centre of the municipality.
The Old Norse form of the name was just Dalr, identical with the word dalr which menas "valley" or "dale". The first element Nord- meaning "northern" was added around the year 1600. The parish church is still called Dale church. Before 1918, the name was written Norddalen.
Coat-of-arms
The coat-of-arms is from modern times. They were granted on 1990. The arms show a red twig of a strawberry plant on a yellow background. Norddal has a tradition for producing fruits and berries, notably strawberries.