407,415 civil servants across 21 of the 24 ministerial departments, as at December 2025. The five largest employers account for 77% of them.
Source: Office for National Statistics, Public Sector Employment Table 8 (Civil Service employment by department). Refreshed quarterly. Figures are rounded to the nearest five. They count civil servants only — they do not include armed forces personnel (in MoD), NHS staff (in DHSC) or police officers (in the Home Office).
The following ministerial departments either roll up into a larger ONS aggregate (e.g. the Attorney General's family) or sit inside the Cabinet Office cluster and are not separately broken out in Table 8.