This depends on the country. See related questions or re-ask your question specifying the country. United States: Andrew Johnson. Following Abraham Lincoln's assassinat…ion on April 15, 1865, Vice President Andrew Johnson (born December 29, 1808 in Raleigh, North Carolina; died July 31, 1875 in Elizabethton, Tennessee) became the seventeenth President of the United States, serving from 1865 April 15 to 1869 March 4. (MORE)
Henry G. Blasdel (born January 29, 1825 in Lawrenceburg, Indiana; died July 22, 1900 in Oakland, California) succeeded James W. Nye as the first Governor of Nevada, serving be…tween December 5, 1864 and January 2, 1871, including the whole of 1866. (MORE)
Arthur I. Boreman (born July 24, 1823 in Waynesburg, Pennsylvania; died April 19, 1896 in Parkersburg, West Virginia), the first Governor of West Virginia, served between June… 20, 1863 and February 26, 1869, including the whole of 1866. (MORE)
Andrew Gregg Curtin (born April 22, 1817 in Bellefonte, Pennsylvania; died October 7, 1894 in Bellefonte, Pennsylvania) succeeded William F. Packer as the fifteenth Governor o…f Pennsylvania, serving between January 15, 1861 and January 15, 1867, including the whole of 1866. (MORE)
James T. Lewis (born October 30, 1819 in Clarendon, New York; died August 4, 1904) succeeded Edward Saloman as the ninth Governor of Wisconsin, serving between January 4, 1864… and January 1, 1866.\n.
\nFollowing the end of Lewis' term as Governor, Lucius Fairchild (born December 27, 1831 in Franklin Mills, Ohio; died May 23, 1896 in Madison, Wisconsin) became the tenth Governor of Wisconsin, serving between January 1, 1866 and January 1, 1872. (MORE)
Reuben Fenton (born July 4, 1819 in Carroll, New York; died August 15, 1885 in Jamestown, New York) succeeded Horatio Seymour as the twenty-second Governor of New York, servin…g between January 1, 1865 and December 31, 1868, including the whole of 1866. (MORE)
Augustus Bradford (born January 9, 1806 in Bel Air, Maryland; died March 1, 1881 in Baltimore, Maryland) succeeded Thomas Holliday Hicks as the thirty-second Governor of Maryl…and, serving between January 8, 1862 and January 10, 1866.\n.
\nFollowing the end of Bradford's term as Governor, Thomas Swann (born February 3, 1809 in Alexandria, Virginia; died July 24, 1883 in Leesburg, Virginia) became the thirty-third Governor of Maryland, serving between January 10, 1866 and January 13, 1869. (MORE)
Richard James Oglesby (born July 25, 1824 in Oldham County, Kentucky; died April 24, 1899 in Elkhart, Illinois) succeeded Richard Yates as the fourteenth Governor of Illinois,… serving between January 16, 1865 and January 11, 1869, including the whole of 1866. (MORE)
William G. Brownlow (born August 29, 1805 in Wythe County, Virginia; died April 29, 1877 in Knoxville, Tennessee) succeeded Edward H. East as the twentieth Governor of Tenness…ee, serving between April 5, 1865 and February 25, 1869, including the whole of 1866. (MORE)