Iver Gunnar Nordseth (born 2 May 1951) is a Norwegian politician for the Liberal Party.
He served as a deputy representative to the Norwegian Parliament from Møre og Romsdal during the terms 1997 - 2001 and 2005 - 2009.
On the local level he is mayor of Smøla municipality since 1991. Since 2003 he is also a member of Møre og Romsdal county council.