Jacob Ellsworth Daubert (April 7, 1884 in Shamokin, Pennsylvania - October 9, 1924 in Cincinnati, Ohio) was a first baseman in Major League Baseball for the Brooklyn Superbas/Robins (1910-1918) and the Cincinnati Reds (1919-1924).
He was the National League's Chalmers Award winner in 1913. He died at age 40 from complications following an appendectomy.