W.J. Yeager was a ambrotypist active in Olympia from 1860s-1870s. In 1865 he operated a studio on Fourth Street near Main in rooms formerly occupied by Edward M. Sammis. From November 1866 to January 19, 1867 he was in business with John V. Yantis. Later he partnered with William M. Ashman probably in the later 1860s or early 1870s.