Isaac N. Quinn (April 24, 1795, New Haven, Connecticut – June 26, 1865, San Rafael, California.) was the Acting Lieutenant Governor of California, 1860–61. 1860 President pro Tempore, California State Senate (for 17 days; succeeded by Charles J. Lansing) He was a Democrat. 1860-1861 Acting Lieutenant Governor (following succession of John G. Downey to Governor). 1861 Resigned as Lieutenant Governor on January 7. References Lieutenant Governors of California California Democrats 1795 births 1865 deaths 19th-century American politicians