Michau is a surname. Notable people with the name include:
Baby Michau (1890–1945), South African international rugby union player Friedrich Michau (born 1979), German international rugby union player Mannetjies Michau (1900–1960), South African international rugby union player Marcelle Michau (born 1963), South African cricketer Théobald Michau (1676–1765), conservative Walloon painter of landscapes
See also Code Michau, legal proposals by Michel de Marillac (1563–1632) Michau Warriors F.C., South African soccer club