Julia Gray McMordie CBE JP (30 March 1860 – 12 April 1942) was an English-born Ulster Unionist Party politician in Northern Ireland. She was made Commander of the Order of the British Empire (CBE) for her role as President of St John Voluntary Aid Detachment in Belfast during World War 1. In 1922 she was one of only two women elected to the Parliament of Northern Ireland, representing South Belfast. She became the first female High Sheriff of Belfast in 1928.