The Commentarii Mathematici Helvetici is a quarterly peer-reviewed scientific journal in mathematics.

The Swiss Mathematical Society started the journal in 1929 after a meeting in May of the previous year.

The Swiss Mathematical Society still owns and operates the journal; the publishing is currently handled on its behalf by the European Mathematical Society.

The scope of the journal includes research articles in all aspects in mathematics.

The editors-in-chief have been Rudolf Fueter (1929–1949), J.J. Burckhardt (1950–1981), P. Gabriel (1982–1989), H. Kraft (1990–2005), and Eva Bayer-Fluckiger (2006–present).