William A. Fields (between c. 1846 and 1852 – September 9, 1898) was an American schoolteacher and principal who served one term as a Republican legislator in the Tennessee House of Representatives from 1885 to 1886. He was also elected a member of the Shelby County county court, a legislative body, and a justice of the peace. He was born an enslaved person.
The American documentary series Who Do You Think You Are? (2011) revealed that he is the paternal great-great-grandfather of actress, singer and Miss America 1984, Vanessa Williams and of actor Chris Williams and the maternal great-great-great-grandfather of Jillian Hervey.