er 1841-1845 it. James Knox Polk 1845-1849 12. Zachary Taylor 1849-1850 13. Millard Fillmore 1850-1853 14. Franklin Pierce 1853.1857 15. James Buchanan 1857.1861 16. Abraham Lincoln 1861-1865 17. Andrew Johnson 1865.1869 18. Ulysses S.Grant 1869-1877 19. Rutherford B. Hayes 1877-1881 20.