Prince William is a geographic parish in York County, New Brunswick, Canada.

[4] The parish is named in honour of Prince William, patron of the King's American Dragoons who settled the area.

In 1833 the western part of Prince William was included in the newly erected Dumfries Parish.

In 1855 an interior area was included in the newly erected Manners Sutton Parish.

[10] In 1895 the rear of Prince William was included in the newly erected McAdam Parish.