| a | | For statistical purposes, the data for United Kingdom do not include this area. |
| b | | Projected est. (medium fertility variant). |
| c | | 2023 |
| d | | 2018 |
| e | | 2024 |
| f | | Population aged 15 to 64 years. |
| g | | Break in the time series. |
| h | | 2013 |
| i | | Population aged 16 years and over. |
| j | | 2011 |
| k | | Index base: 2000=100. |
| l | | 2014 |
| m | | 2019 |
| n | | Data refers to a 5-year period preceding the reference year. |
| o | | Calculated by the UN Statistics Division. |
| p | | For statistical purposes, the foreign-born population includes persons born in United Kingdom, Anguilla, Bermuda, British Virgin Islands, Cayman Islands, Channel Islands, Falkland Islands (Malvinas), Gibraltar, Montserrat, Saint Helena, and Turks and Caicos Islands. |
| q | | 2016 |
| r | | Estimate. |
| s | | 2022 |