JICPOPS UK population estimates for 2021

  Population   67,463,320      
  Adults   55,467,733  
   
    Men
Women
    27,187,245  
  28,280,488  
   aged 15-24        4,009,708       3,791,308  
   aged 25-34        4,549,575       4,445,991  
   aged 35-44        4,269,057       4,342,040  
   aged 45-54        4,328,601       4,450,881  
   aged 55-64        4,187,425       4,355,242  
   aged 65-74        3,259,208       3,515,900  
  aged 75+           2,583,671       3,379,126  
  Children   11,995,587   Boys Girls
  aged 0-14    6,149,688   5,845,899  
  Total Households   28,320,359  
   

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