Merthyr Tydfil Population 2026
Merthyr Tydfil has a population of 43,820, making it the #276 biggest city in 🇬🇧 United Kingdom, located in Wales. Roughly 0.1% of United Kingdom's population lives here. It is about 205× smaller than London, the country's biggest city.
Population (city proper)
43,820
Rank in United Kingdom
#276
Coordinates
51.75°N, 3.38°W
~186 m elevation · Europe/London
Distance to capital (London)
226 km
140 miles, straight line
Other big cities in Wales
Cities near Merthyr Tydfil
FAQ
What is the population of Merthyr Tydfil?
Merthyr Tydfil has a population of 43,820 (city proper, latest official figure via GeoNames), making it the #276 biggest city in United Kingdom.
What region is Merthyr Tydfil in?
Merthyr Tydfil is located in Wales, United Kingdom.
Is Merthyr Tydfil the capital of United Kingdom?
No, the capital of United Kingdom is London, about 226 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.
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