William Ayre (1782 or 1783–April 14, 1855) was a teacher in Nova Scotia, Canada.
Born in Ireland, William Ayre taught in the Antigonish area until 1835, when he moved to Port Hood, Cape Breton Island.
Some short time later, Ayre's teaching license was withdrawn due to drunkenness.
Ayre continued to teach in Cape Breton without a license or financial support from the government.
He continued to teach until 1854 when he retired, moving to Halifax.