Niehaus is a German surname, meaning "new house" in a Low German dialect. Notable people with the surname include:
Bernd H. Niehaus Quesada (born 1941), Costa Rican lawyer and diplomat
Carl Niehaus (born 1959), South African politician and diplomat
Charles Henry Niehaus (1855–1935), American sculptor
Dave Niehaus (1935–2010), American sportscaster
Dick Niehaus (1892– 1957), American baseball player
Ed Niehaus, American businessman and publicist
Frank Niehaus (1902-1985), American football player (American football)
Jutta Niehaus (born 1964), German racing cyclist
Lennie Niehaus (born 1929), American saxophonist, arranger, and composer
Rena Niehaus (born 1954), German actress
Ruth Niehaus (born 1925), German actress
Steve Niehaus, American football player (American football)
Tom Niehaus (born 1957), American politician
Valerie Niehaus (born 1974), German actress