Marcus Saltau CBE (17 June 1869 – 21 July 1945) was an Australian politician.
He was born in Warrnambool to German-born carrier Henry Saltau and Annie McKenzie.
He attended state school and followed his father into the produce trade, eventually becoming manager of the family firm.
In 1924 he won a by-election for Western Province in the Victorian Legislative Council, representing the Nationalist Party.
Denied United Australia Party preselection in 1940, he was lost his seat running as an independent.