1818 – William Henry Barnum was born in Boston Corner, Columbia County, New York.
1851-1852 – Barnum served the State house of representatives.
1867-1876 – He was elected as a Democrat to the Fortieth and to the four succeeding Congresses.
1876-1879 – Barnum is elected to the United States Senate to fill the vacancy caused by the death of Orris S. Ferry.
1876-1889 – He was the chairman of Democratic National Committee.
1889 – William Henry Barnum died 30th of April.