Caerphilly County Borough · Wales
Nelson population
12,857people · latest estimate
Nelson has a population of 12,857, making it the 6th largest place in Caerphilly County Borough.
Year-by-year official estimates for the wider area: Caerphilly population trends, 2001–2025.
Nelson in context
Distances are straight-line from the settlement's recorded coordinates. The 10 km figure sums the recorded places within that radius, so it describes how built-up the surroundings are rather than people per square kilometre.
The centre of Nelson sits in postcode district CF46.
Council tax
The area Band D council tax for Caerphilly, the billing authority covering Nelson, is £2,083 for 2026–27.
From the Welsh Government's council tax levels (Table 1): the overall average including police and community council elements, so it is the council's figure rather than the town's, and your own band depends on your property's 2003 valuation — Wales revalued in 2003 where England still uses 1991.