William Baker (April 14, 1795 – November 6, 1871) was an American lawyer and politician.
At the age of 22, he moved to Springfield, Otsego County, New York, to study law.
In January 1826, he married Delia Bianca Crain of Warren, Herkimer County, New York.
Baker was a member of the New York State Assembly (Otsego Co.) in 1830, 1833 and 1834, and was Speaker in 1834.
On May 25, 1836, he was appointed a Canal Commissioner, and served until the removal of all Democratic commissioners by the newly elected Whig majority in the State Legislature in February 1840.