Thornhill has a population of 6,635, making it the 5th largest place in Cardiff.
#5
of 7 in Cardiff
Year-by-year official estimates for the wider area: Cardiff population trends, 2001–2024.
Thornhill in context
2 km
south-west to Rhiwbina, the nearest larger town
499,243
people live within 10 km
#1,616
largest of 6,358 UK places
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 Thornhill sits in postcode district CF14.
Go deeper
Population since 2001
Cardiff, year by year from ONS estimates
Postcode district CF14
Wards, constituencies and the deprivation profile
Nearby in Cardiff
| # | Place | Population |
|---|---|---|
| 1 | Whitchurch | 13,974 |
| 2 | Rhiwbina | 11,369 |
| 3 | Llandaff | 8,776 |
| 4 | Radyr | 4,710 |
| 5 | Pentyrch | 2,287 |