Post Office – Peterhead, Stuartfield – Opening Hours & Branch Details Post Office lies at 5 Mill Street, approximately 9.75 miles west from the centre of Peterhead (by Stuartfield School and Aden Counrty Park). This branch is pleased to serve customers within the areas of Mintlaw, Longside, Maud, Old Deer, Stuartfield and Fetterangus. Doors are open here today (Friday) from 9:00 am until 12:00 pm, for those who would like to swing by. On this page you will find all the information about Post Office Peterhead, Stuartfield, including the working times, place of business address and phone info.