Argos – Dorchester – Opening Hours & Store Details Argos is positioned at 42 Trinity Street, about a 0.29 mile driving distance north-east of the centre of Dorchester (nearby St Peter’s Church and Borough Gardens). This store is proud to serve customers within the locales of Castle Park, Dorchester Town Centre, Fordington, Lower Burton, Poundbury, Stinsford and Frome Whitfield. This page will provide you with all the information you need on Argos Dorchester, including the open hours, store address info, phone number and other info.