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Population size and mortality

Children and young people aged 10-24 account for 18% of the whole population of the UK.  The most common causes of death include accidents, self-harm and assault, and cancer.

11.8m young people in the UK between 10-24


Young people aged 10-24 form a significant proportion of the UK population. In 2019 there were 7.6 million 10-19 year olds and 11.8 million 10-24 year olds. There were slightly more aged 20-24 than aged 15-19 or 10-14.

Chart 1.1

Young people aged 10-19 represent 11% of the total population of the UK. If we include those up to their 25th birthday, those aged 10-24 account for 18% of the population.

 10-24 year olds make up 18% of the UK population (2019)

Comparing the 2019 population pyramid with 2009 data demonstrates that there are now significantly more 10-14 year olds than 10 years ago, as the mid 2000s baby boom grows up.

The population pyramid also shows the distribution by gender. In the 10-19 age group there are 95 girls for every 100 boys. By the time the population is aged 70 and above, the rate is 122 women for every 100 men.

Population in the UK, by age and gender, 2009 and 2019

21.5% of 10-24 year olds classify themselves as belonging to an ethnic minorityIn the population as a whole more young people than older people fall into ethnic minority groups. However the most recent data are still those from the 2011 census and are thus likely to be out of date.  At that time, the proportion of the population of England and Wales who classified themselves in a group other than white British was 19.5% (Office for National Statistics, 2012).  For young people age 10-19 the proportion was higher; 21.5% classified themselves as falling into a category other than white British. The largest not white minority groups were mixed ethnicity, followed by Pakistani, Indian and African (Black African/Caribbean/Black British).

All data correct as of 1st November 2021