Postcode Area Population for England, Wales and Scotland
We couldn't find this data anywhere on the web, so posted it here in case anyone else needs it.
We took the postcode district population data from the 2021 England and Wales census from here and the postcode population data from the 2022 Scotland census from here. Then combined all the population within the postcode area from either the postcode districts or the individual postcodes, to given the census population by postcode area.
You can find the data in a table below, as well as a CSV.
| Postcode Area | Population |
| AL | 266475 |
| B | 2026571 |
| BA | 466274 |
| BB | 516383 |
| BD | 605269 |
| BH | 578617 |
| BL | 403601 |
| BN | 838723 |
| BR | 319234 |
| BS | 1033005 |
| CA | 319675 |
| CB | 463822 |
| CF | 1035653 |
| CH | 676973 |
| CM | 707666 |
| CO | 448089 |
| CR | 439490 |
| CT | 501887 |
| CV | 899181 |
| CW | 342254 |
| DA | 469214 |
| DE | 774229 |
| DG | 60 |
| DH | 320953 |
| DL | 363985 |
| DN | 768723 |
| DT | 221019 |
| DY | 429559 |
| E | 1103271 |
| EW | 14644 |
| ECA | 3755 |
| ECM | 1869 |
| ECN | 2913 |
| ECR | 5291 |
| ECV | 15915 |
| ECY | 7521 |
| EN | 365585 |
| EX | 599921 |
| FY | 279731 |
| GL | 653953 |
| GU | 767867 |
| HA | 531124 |
| HD | 266048 |
| HG | 141129 |
| HP | 533352 |
| HR | 179733 |
| HU | 455808 |
| HX | 163450 |
| IG | 378322 |
| IP | 629123 |
| KT | 561706 |
| L | 892424 |
| LA | 331902 |
| LD | 50280 |
| LE | 1088272 |
| LL | 534061 |
| LN | 318262 |
| LS | 835922 |
| LU | 373762 |
| M | 1271054 |
| ME | 664160 |
| MK | 591394 |
| N | 883986 |
| NC | 2410 |
| NE | 1189862 |
| NG | 1222052 |
| NN | 742601 |
| NP | 500916 |
| NR | 766553 |
| NW | 574891 |
| OL | 493584 |
| OX | 680610 |
| PE | 972260 |
| PL | 566418 |
| PO | 854784 |
| PR | 550366 |
| RG | 860553 |
| RH | 583653 |
| RM | 583272 |
| S | 1389622 |
| SA | 735677 |
| SE | 1075085 |
| SEP | 3 |
| SG | 437311 |
| SK | 624922 |
| SL | 405122 |
| SM | 237911 |
| SN | 503724 |
| SO | 699993 |
| SP | 258089 |
| SR | 245199 |
| SS | 545242 |
| ST | 661965 |
| SW | 852456 |
| SWA | 307 |
| SWE | 1057 |
| SWH | 692 |
| SWP | 13042 |
| SWV | 21568 |
| SWW | 6889 |
| SWX | 4855 |
| SWY | 459 |
| SY | 350587 |
| TA | 350087 |
| TD | 18022 |
| TF | 236282 |
| TN | 713871 |
| TQ | 299472 |
| TR | 319547 |
| TS | 613960 |
| TW | 542561 |
| UB | 416431 |
| W | 505513 |
| WB | 506 |
| WC | 9 |
| WD | 282979 |
| WF | 549488 |
| WG | 2238 |
| WH | 5933 |
| WJ | 847 |
| WK | 2110 |
| WS | 472430 |
| WT | 3292 |
| WU | 4343 |
| WW | 3775 |
| WA | 642982 |
| WCA | 951 |
| WCB | 2794 |
| WCE | 2412 |
| WCH | 9620 |
| WCN | 6536 |
| WCR | 830 |
| WCV | 270 |
| WCX | 7255 |
| WN | 316899 |
| WR | 312662 |
| WV | 417097 |
| YO | 582897 |
| AB | 510326 |
| DD | 280841 |
| DG | 145697 |
| EH | 940284 |
| FK | 281991 |
| G | 1231251 |
| HS | 26131 |
| IV | 235049 |
| KA | 362801 |
| KW | 52371 |
| KY | 372058 |
| ML | 387166 |
| PA | 326510 |
| PH | 167385 |
| TD | 96276 |
| ZE | 22992 |