Map of Merthyr Tydfil, United Kingdom

Merthyr Tydfil is a city in Wales, United Kingdom, with a population of about 43,820. It lies at 51.7479°N, 3.3778°W. Merthyr Tydfil is about 226 km (140 mi) west of London, the capital. The nearest city on our map is Rhondda, 11 km to the southwest.

Merthyr Tydfil at a glance

Where is Merthyr Tydfil?

• The 13th largest city in Wales on this site.
• Located in the Northern and Western hemispheres.
• Daylight ranges from about 7 h 47 min on the shortest day to 16 h 41 min on the longest day (around 21 December and 21 June).

Cities near Merthyr Tydfil

• Rhondda — 11 km southwest
• Tonypandy — 15 km south
• Pontypool — 24 km east
• Cwmbran — 27 km southeast
• Coity — 28 km southwest
• Bridgend — 30 km southwest
• Neath — 31 km west
• Newport — 32 km southeast
• Cardiff — 33 km southeast
• Briton Ferry — 33 km southwest

Largest cities in Wales

• Cardiff — 372,089
• Swansea — 300,352
• Newport — 161,506
• Rhondda — 69,506
• Wrexham — 65,692
• Buckley — 63,576
• Tonypandy — 62,545
• Barry — 54,673
• Bridgend — 49,597
• Llanelli — 49,591

Largest cities in United Kingdom

• London — 8,961,989
• Birmingham — 1,157,603
• Glasgow — 626,410
• Manchester — 568,996
• Sheffield — 556,500
• Leeds — 536,280
• Edinburgh — 514,990
• Liverpool — 496,770
• Bristol — 479,024
• Cardiff — 372,089

Map of United Kingdom and all its cities →

Sources: place names, coordinates, populations and time zones from GeoNames (CC BY 4.0, data retrieved October 2026). Population figures are the latest values recorded in GeoNames; depending on the country they refer to the city proper, a municipality or a wider urban area, so they can differ from census or metro-area figures. Map © OpenStreetMap contributors.