South Merstham is located in the county of Surrey, South East England, two miles north-east of the town of Redhill, ten miles north of the major town of Crawley, and 18 miles south of London. South Merstham lies two miles south of the Greater London border. South Merstham falls within the district council of Reigate and Banstead, under the county council of Surrey. It is in the RH1 postcode district. The post town for South Merstham is Redhill.
South Merstham is in the ceremonial county of Surrey, the historic county of Surrey, and the administrative county of Surrey.
South Merstham is situated roughly centrally between the southernmost and northernmost extremities of Surrey, and towards the easternmost extremity of Surrey.
The nearest postcode to the centre of South Merstham is RH1 3HU.
South Merstham is situated towards the northernmost extremity of the RH1 postcode district, and roughly centrally between the easternmost and westernmost extremities of the RH1 postcode district.
The post town for South Merstham is Redhill. South Merstham is in the RH1 postcode district, which corresponds to the post town of Redhill.
The centre of South Merstham is located at position 51.26007° latitude and -0.1455° longitude.
The centre of South Merstham is located at the grid reference easting 529496 and northing 152845 within the British National Grid (OSGB36) system.
Position of South Merstham relative to nearby towns. Distance is measured from the centre of South Merstham to the centre of the town.
Position of South Merstham relative to nearby cities. Distance is measured from the centre of South Merstham to the centre of the city.