Ancestry UK

Castlederg, Co. Tyrone

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Castlederg (or Castle Derg) Poor Law Union was formally declared on the 7th May 1839 and covered an area of 143 square miles. Its operation was overseen by an elected Board of Guardians, 14 in number, representing its 14 electoral divisions as listed below (figures in brackets indicate numbers of Guardians if more than one):

Co. Tyrone: Bomackatall, Castlederg, Castle Gore, Clare, Corgary, Dooish, West Drumquin, Killen, Killeter, Lisnacloon, Listymore, Magheracreggan, Tully, Tullycar.

The Board also included 3 ex-officio Guardians, making a total of 17. The Guardians met each week on Friday.

The population falling within the Union at the 1831 census had been 69,137 with divisions ranging in size from Killylough (population 1,770) to Castlederg itself (7,954).

The new Castlederg Union workhouse was erected on a 3.5-acre site at the north-east of Castlederg. The land was donated by the first Chairman of the Guardians, Sir Robert Ferguson. Designed by the Poor Law Commissioners' architect George Wilkinson, the building was intended to accommodate 200. Of all the workhouses in Ireland, only nearby Gortin had a capacity this small. Castlederg's construction was carried out by John Maguire of Omagh. It cost £2,100 plus £484 for fittings etc. and had the lowest construction cost of any new Irish workhouse. The workhouse was declared fit for the reception of paupers on 20th February 1841 and admitted its first inmates on 2nd March. Its location and layout are shown on the 1907 map below.

Castlederg workhouse site, 1907

The buildings lacked the single central block normally found at the front of the site. The entrance and administrative functions were split between two separate small blocks, a feature also found at Ballycastle and Dunfanaghy.

The T-shaped main accommodation block had the Master's quarters at the centre, with male and female wings to each side. At the rear, a central spine containing the dining-hall, chapel, and utility rooms. A small separate T-shaped block at the rear contained the infirmary.

During the famine in the mid-1840s, an extra storey was added to the infirmary to accommodate an additional 56 inmates. A 36-bed fever hospital was subsequently erected at the north of the workhouse.

Castlederg fever hospital from the east, 2003.
© Peter Higginbotham.

Because of the Union's small size, the posts of Union clerk and workhouse master were initially combined, with David Johnston being the first appointee. The posts were however subsequently separated.

At the 1901 census, the population of the Union was 11,789.

The workhouse closed in 1929 and lay empty before being demolished in the 1930s and replaced by the Edwards school. The fever hospital was remodelled in 1929 and became the heart of the Derg Valley Hospital, now closed.


  • Masters: David Johnston, John S Nesbitt, William Roulston.
  • Clerks: David Johnston, Edward Hemphill, Robert Ascott.


Note: many repositories impose a closure period of up to 100 years for records identifying individuals. Before travelling a long distance, always check that the records you want to consult will be available.

  • Public Record Office of Northern Ireland, 2 Titanic Boulevard, Titanic Quarter, Belfast BT3 9HQ. Holdings include: Board of Guardians' minutes (1839-1948); Returns of Deaths (1841-1934); Combined workhouse registers and statistical records (1923-49); Indoor registers and discharge books (1947-8); etc.


  • The Workhouses of Ulster by Michael H Gould (1983, Ulster Architectural Heritage Society).
  • Workhouses of the North West Edited by Jack Johnston (1996, WEA)
  • The Workhouses of Ireland by John O'Connor (Anvil Books, 1995)


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