William Doan ( born April 4, 1792 District of Maine, Massachusetts, † June 22, 1847 in Withamsville, Ohio ) was an American politician. Between 1839 and 1843 he represented the State of Ohio in the U.S. House of Representatives.
Born in present-day Maine William Doan attended the public schools of his home. In 1812 he came with his parents to Ohio, where the family settled near Lindale. After a subsequent study of medicine and his 1818 was admitted as a doctor, he started in Withamsville to work in this profession. In 1827 he completed his medical training at the Ohio Medical College in Cincinnati. Politically, he joined the Democratic Party. In the years 1831 and 1832 he sat as an MP in the House of Representatives from Ohio; 1833 to 1834 he was a member of the local state Senate.
In the congressional elections of 1838, Doan was in the fifth electoral district of Ohio in the U.S. House of Representatives in Washington DC chosen, where he became the successor of Thomas L. Hamer on March 4, 1839. After a re-election he was able to complete in Congress until March 3, 1843 two legislative sessions. The time from 1841 was marked by the tensions between President John Tyler and the Whigs. It was also at that time already been discussed about a possible annexation of the independent Republic of Texas since 1836 by Mexico.
In 1842, William Doan waived another candidacy. After his time in the U.S. House of Representatives, he practiced as a doctor again. He died on 22 June 1847 in Withamsville.