The following are the 19 longest rivers of Norway, ranked by length:
Glomma, Tana, Pasvikelva and Ivalo, (109 km in Norway) Numedalslågen, Gudbrandsdalslågen and Vorma, Drammensvassdraget or Drammenselva, Hallingdalselva and Snarumselva, Skiensvassdraget, Otra, Altaelva, Namsen, Arendalsvassdraget or Nidelva in Aust-Agder, Trysilelva, Orkla, Vefsna, Nea-Nidelvvassdraget or Nidelva in Trøndelag, Karasjohka, Gaula, Renaelva,
Other rivers Other rivers include: Akerselva Eira Flakstadelva Gaula Tista
References
Norges lengste elver("Norway's longest rivers") (Norwegian))