Claude Janiak (born 30 October 1948) is a Swiss politician of Polish origin, lawyer and President of the Swiss National Council for the 2005/2006 term.
Member of the Social Democratic Party (SPS), he was elected to the National Council in 1999 in the canton of Basel-Land and reelected in 2003.
From 1991, he is a member of the board of the cantonal bank of Basel-Land (Basellandschaftliche Kantonalbank).
Born in Basel of Polish father and a Swiss mother, he acquired Swiss citizenship only in 1956 (he has also been a Polish citizen since birth).
He was the first openly homosexual President of the Swiss National Council and lives in a registered partnership.