Sir William MacMahon, 1st Baronet (1776–1837) was an Irish barrister and judge of the early nineteenth century. He was a member of a Limerick family which became politically prominent through their influence with the Prince Regent, later King George IV. He was the first of the McMahon Baronets of Dublin.
- Occupation
- judge, barrister
- Born
- 1776, July 12, 1776
- Died
- 1837
