It returned one Member of Parliament (MP) until it was abolished with effect from the 1922 general election.
1885–1922: The baronies of Armagh and Tiranny, that part of the barony of Oneilland West not contained within the constituency of North Armagh, that part of the barony of Fews Lower contained within the parishes of Kildarton and Mullaghbrack, the parish of Lisnadill excluding the townlands of Ballymacnab, Cashel, Foley and Seagahan, and the townlands of Corhammock and Edenykennedy in the parish of Kilclooney, that part of the barony of Orior Lower consisting of that part of the parish of Kilmore not contained within the constituency of North Armagh and the townlands of Aughlish, Ballymore, Ballysheil Beg, Ballysheil More, Cargans, Clare, Cloghoge, Coolyhill, Derryallen, Drumnaleg, Druminure, Drumnaglontagh, Lisbane, Lisnakea, Mavemacullen, Monclone, Moodoge, Mullantur, Mullaghglass, Terryhoogan, Tullyhugh and Tullymacann in the parish of Ballymore, and that part of the barony of Fews Upper consisting of the townland of Lisnadill.
Prior to the 1885 United Kingdom general election and from the dissolution of Parliament in 1922 the area was part of the Armagh constituency.
The constituency was a predominantly Conservative then Unionist area, although not as strongly so as some other parts of Northern Ireland.
Sinn Féin contested the general election of 1918 on the platform that instead of taking up any seats they won in the United Kingdom Parliament, they would establish a revolutionary assembly in Dublin.