William Baylies was an American lawyer and politician who served four non-consecutive terms as a U.S. representative from Massachusetts in the early to mid-19th century.
- Occupation
- politician, lawyer
- Position held
- United States representative, member of the Massachusetts House of Representatives, member of the State Senate of Massachusetts
- Citizenship
- United States
- Born
- September 15, 1776
- Died
- September 27, 1865
