Southminster is a town on the Dengie peninsula in the Maldon district of Essex in the East of England. It lies about three miles north of Burnham-on-Crouch and ten miles south-east of Maldon. To the north is the River Blackwater, which is tidal and since Roman times has been the gateway to trading in the area. Saint Lawrence Bay, which is part of the Southminster area, can be accessed by road. The station is situated on a single-line branch from Wickford, which was electrified in the 1980s, and provides a service every 45 minutes to Wickford, continuing in peak hours through to Liverpool Street station in the City of London, thus including the town in the London commuter belt. Southminster is a historic village sited in the centre of the Dengie peninsula that once formed a hundred of the same name.
A major horse market used to be held annually in the village. Southminster marshes were a favourite centre for hare coursing in Victorian times. Pandole Wood contains ancient earthworks believed to date from the Iron Age. The landscape surrounding the town, and most of the peninsula, is characterized by a pattern of strictly rectangular field boundaries and evidence of a unit of measurement that has been applied to the scheme as a whole. Middle-Saxon, or mid-Roman administrations have been suggested as its origin. The late-Roman road leading to St.Peter's chapel cuts across this pattern.