JICPOPS UK population estimates for 2017

Total population     66,046,610
  Adults   54,256,260
    Men     26,545,750
      aged 15-24     4,058,587
      aged 25-34     4,524,190
      aged 35-44     4,126,851
      aged 45-54     4,540,694
      aged 55-64     3,822,692
      aged 65-74     3,173,917
      aged 75+     2,298,819
    Women   27,710,510
      aged 15-24     3,853,182
      aged 25-34     4,479,390
      aged 35-44     4,191,463
      aged 45-54     4,682,049
      aged 55-64     3,951,231
      aged 65-74     3,415,384
      aged 75+ 3,137,811
  Children     11,790,350
    Boys aged 0-14     6,039,786
    Girls aged 0-14     5,750,564
Total households     28,030,952

Data with population, households and demographics within postcode sector are available from CACI

 

66,046,610