Sæther is a Norwegian surname. Notable people with the surname include:
Andrine Sæther (born 1964), Norwegian actress Bjarne Berg-Sæther (1919–2009), Norwegian politician for the Labour Party Gjøran Sæther (born 1982), Norwegian artist and painter Harald Sæther (born 1946), Norwegian composer Jan Valentin Sæther (1944–2018), Norwegian figurative painter, sculptor and Gnosticism priest Morten Sæther (born 1959), Norwegian cyclist Ole Sæther (1870-1946), Norwegian rifle shooter Ole A. Sæther (1936-2013), Norwegian entomologist Olaf Sæther (1872-1945), Norwegian rifle shooter Peder Sæther (1810-1886), Norwegian-American banker Svein Ole Sæther (born 1948), Norwegian diplomat Wera Sæther (born 1945), Norwegian psychologist and writer