Cardiff population statistics

In 2024, there were 1.1M residents in Cardiff postcode area with an average age of 40.4 years. Population density was 755 residents per square kilometer. Population grew by 13.0% since 2002 and population average age increased by 2.3 years in the same period.

Key Population Data: Residents, Age and Density in 2024 (latest estimate from ONS)
Population Estimates	Value in 2024
Total residents	1.1M
Average age	40.4
Population density	755

Cardiff population density map

shows a number of residents per square kilometer(km²), estimates from 2020.

Cardiff population average age map

Population average age by LSOA (County) in 2018.

Cardiff population growth

Total population per year outlines headcount differences.

Cardiff population pyramid

shows the distribution of various age groups in a population in 2024. Females are shown on the left, males are shown on the right.

Cardiff population pyramid by year

Cardiff population share by decade of age

Shares of population age groups compared to corresponding shares of population groups in England & Wales, 2024.

Cardiff working age population share

Working age population share compared to working age population share in England & Wales, 2024.

Age Distribution and Comparison to England & Wales
age group	head-count	% share of population	% for Eng & Wales
0-15	189k	17.7%	18.3%
16-64	681k	63.7%	62.8%
65+	199k	18.6%	18.9%

Average Age in Cardiff postcode area and Comparison to England & Wales
postcode area	Average age in 2024
Cardiff	40.4
England & Wales	40.8

Cardiff population average age

Annual area statistics of Cardiff's population average age compared to country statistics.

Cardiff residential areas map

Purple-colored areas are business or industrial areas. Green-colored areas provide quieter surroundings and better living. Map is based on a UK Census 2011 data. Colors calculated from the ratio of number of residents divided by a number of workday people.