William Hersey Otis Haliburton (September 3, 1767 – July 7, 1829) was a lawyer, judge, and political figure in Nova Scotia.
Haliburton studied law in Halifax and returned to Windsor to practice.
He later served as Chief Justice of the Inferior Court of Common Pleas.
He was President of the Court of Quarter Sessions for the Middle Division until his death at Windsor at the age of 61.
He was the father of Thomas Chandler Haliburton, the Nova Scotian jurist and author who emigrated to England and served as a Conservative Member of Parliament.