Denis Joseph Oullahan (1824 – November 5, 1889) served as California State Treasurer 1884–1887. Career He was late the Democratic delegate for San Joaquin County 1873–1889. He also served in the military with the Montgomery Guard located in San Francisco. He was Captain; elected January 22, 1864; commissioned February 9, 1864. References Sources State treasurers of California 1824 births Date of birth missing 1889 deaths