This list of tunnels in Norway includes any road, rail or waterway tunnel in Norway.
There are over 900 road tunnels in Norway with total length exceeding 750 km. https://archive.today/20071113102125/http://www.vegvesen.no/servlet/Satellite?cid=1092405927948&pagename=vegvesen/SVVartikkel/SVVartikkelMedRelatert&c=SVVartikkel
The longest road tunnels (>7 km, with opening year and length):
The longest subsea road tunnels (see also List of subsea tunnels in Norway):
The longest railway tunnels: