William Berrian Vail, (December 19, 1823 – April 10, 1904) was a Canadian businessman and politician.
- Occupation
- politician, businessperson
- Position held
- member of the House of Commons of Canada, member of the House of Commons of Canada, member of the Nova Scotia House of Assembly, member of the Nova Scotia House of Assembly
- Citizenship
- Canada
- Born
- December 19, 1823
- Died
- April 10, 1904