Post Office – Dungannon, Galbally – Opening Hours & Branch Details Post Office is proud to be located at 160 Gortnagola Road, approximately 5.17 miles north-west from the centre of Dungannon. The branch serves patrons mainly from the neighborhoods of Kilmore, Glenbeg, Dernanaught, Gortnagola, Glenburrisk, Galbally, Crosscavanagh and Derryalskea. Today (Friday), it’s open from 9:00 am to 5:30 pm. This page will give you all the information you need on Post Office Dungannon, Galbally, including the hours of opening, branch address info, customer reviews and other relevant info.