Althaus

Althaus is a surname. Notable people with the surname include:

• Dieter Althaus (born 1958), German politician, Minister-President of Thuringia
• Johannes Althusius (1557–1638), also known as Johannes Althaus, German Calivinist philosopher and theologian
• Marcella Althaus-Reid, Argentinian professor
• Adolf Paul Johannes Althaus, theologian
• Kenneth Althaus, U.S. Army, general during World War II
• Ernst Freiherr von Althaus, one of the world's first flying aces