18 year olds in England and Wales
According to the 2017 estimate (published in June 2018) there are 681,700 people aged 18 years old in England and Wales: 350,201 men and 331,499 women.
Regional breakdown of number of 18 year olds
London has 94,580 people aged 18 years old: 48,776 male and 45,962 female.
England has 657,005 people aged 18 years old: 331,396 male and 313,737 female.
Wales has 36567 people aged 18 years old: 18,805 male and 17,762 female.
Migration and 18 year olds
The chart below shows the number of 18 year old who have moved to England and Wales from abroad. There is a marked dip in 2017 - 1 year after the Brexit vote.