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Catholics were excluded from taking seats until the enactment of the Roman Catholic Relief Act 1829. Under the Parliamentary Elections (Ireland) Act 1829, the traditional county 40 shilling freehold landowning qualification was changed to a £10 qualification (which was an increase to five times the previous level). Before the Representation of the People Act 1884, there was a restrictive property-based franchise. It was not until the householder franchise was introduced for county elections, in the electoral reforms which took effect in 1885, that most (but not all) adult males became voters. In these circumstances, most members of parliament came from a limited number of Protestant aristocratic and gentry families. There were few contested elections.
In the first half-century or so after the union, the constituency was fairly evenly balanced between Whig/Liberal and Tory/Conservative parties. Thereafter the area became more Conservative.
In 1922, following the establishment of the Parliament of Northern Ireland, the number of seats in Northern Ireland at Westminster was cut from 30 to 13 under the Government of Ireland Act 1920. The single-seat constituency of Armagh consisted of the entirety of County Armagh. From its inception, Armagh had a unionist majority, though by the 1970s the nationalist vote was in the mid-30s%. In 1951, it was one of the last four seats to be uncontested in a UK general election, and in 1954 it saw the last uncontested by-election in the UK. In 1974 the Ulster Unionist Party repudiated the Sunningdale Agreement and so did not reselect the pro-Sunningdale MP, John Maginnis. Instead, they ran Harold McCusker, who held the seat until 1983. He was then elected for Upper Bann, which contained part of Armagh.
In 1983 most of the constituency became part of the Newry and Armagh constituency, with part going to Upper Bann.
In two-member elections, the bloc voting system was used. Voters could cast a vote for one or two candidates, as they chose. The two candidates with the largest number of votes were elected.
After 1832, when registration of voters was introduced, a turnout figure is given for contested elections. In two-member elections, when the exact number of participating voters is unknown, this is calculated by dividing the number of votes by two. To the extent that voters did not use both their votes this will be an underestimate of turnout. If the electorate figure is unknown the last known electorate figure is used to provide an estimate of turnout.
Where a party had more than one candidate in one or both of a pair of successive elections change is calculated for each individual candidate, otherwise change is based on the party vote.
Armagh election results
Elections in the 19th century
Archibald Acheson and Robert Camden Cope were co-opted as non-partisans in 1801.
Stooks Smith, Henry (1973) . Craig, F. W. S. (ed.). The Parliaments of England (2nd ed.). Political Reference Publications.
Walker, Brian M., ed. (1978). Parliamentary Election Results in Ireland, 1801–1922. Royal Irish Academy. pp. 196–197, 250–251.
Walker, Brian M., ed. (1992). Parliamentary Election Results in Ireland, 1918–92: Irish elections to parliaments and parliamentary assemblies at Westminster, Belfast, Dublin, Strabourg. Dublin: Royal Irish Academy. ISBN0901714968. ISSN0332-0286.
Stenton, M., ed. (1976). Who's Who of British members of parliament: Volume I 1832–1885. The Harvester Press.
