Ann Gallagher (born 2 March 1967) is a former Labour Party politician from County Leitrim in Ireland. She was a senator from 1993 to 1997. She obtained an honours law degree from Trinity College Dublin and is a solicitor by profession.
Gallagher stood as a Labour candidate for Dáil Éireann in the Cavan–Monaghan constituency at the 1992 general election and nearly won a seat, coming 6th in a five-seater constituency. In the subsequent elections to the 20th Seanad Éireann, she topped the poll and was elected on the Industrial and Commercial Panel. She served as a Senator in the Irish Parliament from 1993 to 1997. She was a member of the Northern Ireland Forum for Peace and Reconciliation. She was a member of the Joint Oireachtas Committee on Women's Rights and the Joint Oireachtas Committee on Foreign Affairs. She was also appointed to the Oireachtas Committee to Review the Constitution. She was the party's Spokesperson for Justice, Equality and Law Reform.