Cattanach () is a Scottish surname. It may refer to:
Bruce Macintosh Cattanach (1932–2020), Scottish pioneer of mouse genetics research George Cattanach (1878–1954), Canadian lacrosse player Helen Cattanach (1920–1994), Scottish nurse John Cattanach (1863–1926), American baseball player John Cattanach (shinty) (1885–1915), Scottish shinty player Lachlan Cattanach Maclean, 11th Chief (1465–1523), Scottish clan chief Robert Cattanach (born 1984), Australian footballer
See also Clan Macpherson, a Scottish clan, part of the larger Clan Chattan Confederation Cattanach v Melchior, an Australian court case