Post Office – Armagh, Killylea – Opening Hours & Branch Details You can find Post Office at 26 Main Street, approximately a 4.92 mile driving distance west of the centre of Armagh (near Killylea Primary School). The branch serves people mainly from the neighborhoods of Killylea Bottoms, Killylea Bog, Naul, Killylea, Darton, Pollnagh, Annaghananny and Mullaghatinny. Open hours are from 9:00 am – 5:30 pm today (Friday). Please review this page for the specifics on Post Office Armagh, Killylea, including the hours of business, map, customer experience and other information.