Dame Dehra S. Parker, GBE, PC (NI) (13 August 1882[1] – 30 November 1963), was the longest serving female MP in the House of Commons of Northern Ireland.

During the 1949 Northern Ireland General Election, with anti-partition agitation a common theme across the region, she was opposed in South Londonderry by a Nationalist Party candidate, T.B.

She served as Minister of Health and Local Government from 26 August 1949 to 13 March 1957 and became a member of the Privy Council of Northern Ireland in 1949, which entitled her to the style The Right Honourable.

[6] Outside of parliamentary activities, Dame Dehra was a long-serving local councillor on Magherafelt Rural District Council, president of both the Northern Ireland Physical Training Association and the Girls' Training Corps, and chairman of the Ancient Monuments Advisory Committee.

[10] She died at her home, Shanemullagh House, Castledawson, in the south of County Londonderry, on 28 November 1963, at age 81.