Post Office – Newton Steward, Street John Street – Opening Hours & Branch Details Post Office is easily accessible at 79 Street John Street, a 5.90 mile drive south-east from the centre of Newton Steward (close to St John Street). The branch is an added feature to the districts of Creetown, Kirkinner, Wigtown, Palnure, Carsewalloch, Carsluith, Bladnoch and Loch Head. It won’t be open today (Friday). On this page you’ll find all the information about Post Office Newton Steward, Street John Street, including the open hours, place of business address details, customer reviews or other relevant info.