Emil August Geiss (March 20, 1867 – October 4, 1911) was an American professional baseball player who was a pitcher and infielder for one season in Major League Baseball.
He appeared in three games for the 1887 Chicago White Stockings; one as a pitcher, one at first base, and one at second base.
His brother, Bill Geiss, played parts of 1882 and 1884 at the major league level.