Post Office – Collin – Opening Hours & Branch Details You may visit Post Office on Collin Village Hall, approximately a 0.07 mile distance west of the centre of Collin (not far from Bypass). The branch serves customers primarily from the neighborhoods of Dumfries, Greenlea, Collin Town Centre, Torthorwald, Heathhall, Middlebie and Maxwelltown. For the whole day (Friday) it’s closed. Please review the sections on this page about Post Office Collin, including the business hours, directions, direct telephone and more info.