Parelius Hjalmar Bang Berntsen (24 February 1910 – 16 May 1995) was a Norwegian politician for the Labour Party.
He was born in Fauske.
He was elected to the Norwegian Parliament from Nordland in 1945, and was re-elected on four occasions.
Bang Berntsen was deputy mayor of Nord-Rana municipality during the period 1937–1941.