Merthyr is located in the county of Dyfed, Wales, four miles west of the town of Carmarthen, 26 miles north-west of the major city of Swansea, 59 miles north-west of Cardiff, and 185 miles west of London. Merthyr was historically in the county of Carmarthenshire. Merthyr falls within the unitary authority of Sir Gaerfyrddin - Carmarthenshire. It is in the SA33 postcode district. The post town for Merthyr is Carmarthen.
Merthyr is in the ceremonial county of Dyfed, the historic county of Carmarthenshire, and the administrative county of Sir Gaerfyrddin - Carmarthenshire.
Ceremonial County | Dyfed |
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Historic County | Carmarthenshire |
Administrative County | Sir Gaerfyrddin - Carmarthenshire |
Merthyr is situated towards the southernmost extremity of Dyfed, and roughly centrally between the easternmost and westernmost extremities of Dyfed.
The nearest postcode to the centre of Merthyr is SA33 5EG.
Merthyr is situated roughly centrally between the southernmost and northernmost extremities of the SA33 postcode district, and roughly centrally between the easternmost and westernmost extremities of the SA33 postcode district.
The post town for Merthyr is Carmarthen. Merthyr is in the SA33 postcode district, which corresponds to the post town of Carmarthen.
The centre of Merthyr is located at position 51.86185° latitude and -4.39487° longitude.
Latitude | 51.86185° |
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Longitude | -4.39487° |
The centre of Merthyr is located at the grid reference easting 235189 and northing 220853 within the British National Grid (OSGB36) system.
Easting | 235189 |
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Northing | 220853 |
Position of Merthyr relative to nearby towns. Distance is measured from the centre of Merthyr to the centre of the town.
Position of Merthyr relative to nearby cities. Distance is measured from the centre of Merthyr to the centre of the city.