Inger-Marie Ytterhorn (born 18 September 1941) is a Norwegian politician for the Progress Party.
She was elected to the Norwegian Parliament from Hordaland in 1989, but was not re-elected in 1993.
She later served in the position of deputy representative during the terms 1993–1997 and 1997–2001.
Her late husband Bjørn Erling Ytterhorn was also a member of the Norwegian Parliament.
She is a member of The Norwegian Nobel Committee, the body that awards The Nobel Peace Prize.