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 Calvinist philosopher and theologian
 * Marcella Althaus-Reid, Argentine 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
 * Urs Althaus, Swiss actor