Mary O'Neill (Canadian politician)

Mary O'Neill is a Canadian politician who served as a Member of the Legislative Assembly (MLA) for the riding of Cape Breton West in Nova Scotia. She was a member of the Progressive Conservative Party.

O'Neill was first elected to the Nova Scotia House of Assembly in the 1999 provincial election. She was re-elected in the 2003 election. During her time in office, she served in various roles, including as a member of the Standing Committee on Economic Development.

In the 2006 provincial election, O'Neill was defeated by Labour candidate Russell MacKinnon.