| William Baylis | |
| Fullname: | William Henry Baylis |
| Birth Place: | San Francisco, California, U.S. |
| Headercolor: | lightsteelblue |
| Show-Medals: | yes |
William Henry Baylis (born April 15, 1962 in San Francisco, California) is an American former competitive sailor and Olympic silver medalist. At the 1988 Summer Olympics, Baylis finished in 2nd place in the soling class along with his partners John Kostecki and Robert Billingham.[1]