The 67 largest Government Administration companies in London (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	UK Civil Service gov.uk This company implements government policies, delivering essential public services in the UK	Government Administration	🇬🇧 London	238,504	n/a
2	Department for Education gov.uk Develop education, training, and social care policies, offer diverse job roles, flexible work, and community involvement opportunities across England.	Government Administration	🇬🇧 London	43,294	n/a
3	Department for Work and Pensions (DWP)gov.uk The company is responsible for welfare, pensions, child maintenance, and benefits, aiming to reduce poverty, promote work, and ensure financial security for all	Government Administration	🇬🇧 London	33,465	1948
4	HM Revenue & Customs gov.uk UK's tax, payments, and customs authority, collecting funds for public services, providing financial support, ensuring tax compliance, and combating fraudulent activities	Government Administration	🇬🇧 London	26,882	2005
5	Department for Culture, Media and Sport civil-service-careers.gov.uk Supporting culture, arts, media, sport, tourism, and civil society in England, championing sports and cultural industries, enhancing community cohesiveness Governed by the Department for Culture, Media and Sport	Government Administration	🇬🇧 London	24,000	n/a
6	Ministry of Justice UK gov.uk Government department responsible for justice system administration, legal affairs, courts, prisons, and public safety in the United Kingdom.	Government Administration	🇬🇧 London	20,603	2007
7	UK Home Office gov.uk The company works on issues related to drug use, alcohol policy, terrorism, crime prevention, border control, immigration, policing, and fire prevention and rescue	Government Administration	🇬🇧 London	17,613	1782
8	HM Prison and Probation Service gov.uk An executive agency of the Ministry of Justice, HM Prison and Probation Service ensures court sentences are served in prisons and communities, supporting positive changes for offenders	Government Administration	🇬🇧 London	12,547	n/a
9	Department for Business and Trade business.gov.uk Support international investment into UK and assist UK businesses to grow, export, and create jobs and opportunities nationwide.	Government Administration	🇬🇧 London	6,775	2016
10	Foreign, Commonwealth and Development Office gov.uk The company promotes UK interests globally, safeguarding security, defending values, reducing poverty, and tackling challenges with international partners	Government Administration	🇬🇧 London	6,543	n/a
11	Department for Environment, Food and Rural Affairs gov.uk A government department in the UK responsible for environmental, food, and rural policies and regulations, focusing on sustainability and protection	Government Administration	🇬🇧 London	6,227	2001
12	HM Courts & Tribunals Service (HMCTS)gov.uk This organization oversees the administration of courts and tribunals in England, Wales, Scotland, and Northern Ireland, ensuring fair and efficient access to justice	Government Administration	🇬🇧 London	5,284	2011
13	Southwark Council southwark.gov.uk Local government focused on enhancing community quality of life through investment, workforce development, and improving safety, cleanliness, and accessibility.	Government Administration	🇬🇧 London	3,630	n/a
14	Department for Transport (DfT), United Kingdom gov.uk This company works with agencies and partners to support the transport network in the UK, investing in infrastructure, improving services, and promoting sustainable transportation solutions	Government Administration	🇬🇧 London	3,536	1919
15	City of London Corporation bit.ly Governing body managing services, environment, economy, and community within the Square Mile to support a thriving, sustainable London.	Government Administration	🇬🇧 London	3,239	1067
16	London Borough of Camden camden.gov.uk Local government focused on inclusive community services, tackling inequality, climate action, and fostering a people-centred, progressive borough culture.	Government Administration	🇬🇧 London	3,210	n/a
17	Department for Energy Security and Net Zero gov.uk The former Department of Energy and Climate Change ensured secure, clean, affordable energy supplies, promoted international climate action, and managed UK's energy legacy	Government Administration	🇬🇧 London	3,191	2008
18	London Borough of Tower Hamlets towerhamlets.gov.uk Local government focused on community support, poverty reduction, partnership working, and maintaining a vibrant, growing, and creative borough environment.	Government Administration	🇬🇧 London	3,171	1965
19	London Borough of Lambeth beacons.ai Providing planning, social work, housing, and education services to a diverse community of over 300,000 residents and businesses.	Government Administration	🇬🇧 London	3,148	1965
20	Islington Council islington.gov.uk Local government focused on affordable housing, job investment, environmental health, youth development, and fostering safe, inclusive community connections.	Government Administration	🇬🇧 London	2,986	1963
21	Westminster City Council westminster.gov.uk Local government leadership providing city management, public services, and community support under the guidance of elected officials and executives.	Government Administration	🇬🇧 London	2,968	n/a
22	Richmond and Wandsworth Councils jobs.richmondandwandsworth.gov.uk Deliver high-quality public services across two London boroughs, supporting communities through innovation, collaboration, and adapting to change.	Government Administration	🇬🇧 London	2,965	n/a
23	London Borough of Hackney hackney.gov.uk A high-performing local authority in the UK, focusing on residents to make Hackney fairer, safer, and more sustainable through excellent services and thriving businesses	Government Administration	🇬🇧 London	2,896	n/a
24	Department for Science, Innovation and Technology gov.uk Advancing the UK's position in global science and technology to lead in innovation and progress on a worldwide scale	Government Administration	🇬🇧 London	2,608	2016
25	Ingeus ingeus.co.uk This organization provides services to improve skills, employment, wellbeing, and social inclusion, including employment programs, youth services, training support, and probation services	Government Administration	🇬🇧 London	2,546	2002
26	Ministry of Housing, Communities and Local Government gov.uk The company focuses on investing in local areas, building homes, supporting communities, and overseeing local government and building safety	Government Administration	🇬🇧 London	2,484	n/a
27	Lewisham Council lewisham.gov.uk Promoting community support, cultural diversity, refugee rights, climate action, health equality, job safeguarding, and resident up-skilling for a fairer future.	Government Administration	🇬🇧 London	2,356	1965
28	Royal Borough of Greenwich royalgreenwich.gov.uk A diverse and historic borough in south east London with thousands of employees creating a great place for residents Provides job opportunities	Government Administration	🇬🇧 London	2,215	1965
29	DWP Digital careers.dwp.gov.uk The company is at the forefront of technology projects in the UK government, delivering user-friendly services that impact millions while fostering innovation and diverse talent	Government Administration	🇬🇧 London	2,212	n/a
30	London Borough of Waltham Forest walthamforest.gov.uk Local government focused on cultural heritage, community diversity, urban regeneration, and improving quality of life for residents.	Government Administration	🇬🇧 London	2,136	1965
31	UK government www.gov.uk It provides information and guidance regarding various services offered by the UK government to support citizens and businesses.	Government Administration	🇬🇧 London	2,096	n/a
32	London Borough of Barking and Dagenham lbbd.gov.uk A growing London borough investing in physical infrastructure, community, housing, a film studio, a university campus, and a Youth Zone Visit website for more information	Government Administration	🇬🇧 London	2,002	1965
33	Royal Borough of Kensington and Chelsea rbkc.gov.uk The organization aims to provide high-quality services in Kensington and Chelsea to improve residents' lives, environment, housing, and community resources	Government Administration	🇬🇧 London	1,968	n/a
34	Barnet Council barnet.gov.uk Local government providing public services and community support to the largest London borough with over 349,000 residents.	Government Administration	🇬🇧 London	1,821	1965
35	Hammersmith & Fulham Council lbhf.gov.uk Local government providing services, governance, and community support to residents within a densely populated London borough area.	Government Administration	🇬🇧 London	1,812	1965
36	UK National Audit Office nao.org.uk Independent public spending watchdog in the UK, supporting Parliament in holding government accountable and improving public services through high-quality audits	Government Administration	🇬🇧 London	1,760	1983
37	Greater London Authority london.gov.uk Strategic authority implementing mayoral policies, supporting assembly oversight, managing finance, communities, growth, housing, resources, and communications for London.	Government Administration	🇬🇧 London	1,737	1999
38	Medicines and Healthcare products Regulatory Agency gov.uk Regulating medicines and medical devices to improve health, supported by science and research, with career opportunities in central London and Hertfordshire	Government Administration	🇬🇧 London	1,718	n/a
39	Food Standards Agency food.gov.uk Ensure food safety, transparency, and trust by providing science-based guidance, promoting healthy, sustainable diets, and informing consumers.	Government Administration	🇬🇧 London	1,493	2000
40	HMPPS Insights justice.gov.uk The company supports evidence-informed policy and operations in criminal justice by communicating insights, promoting learning, and engaging stakeholders effectively	Government Administration	🇬🇧 London	1,454	n/a
41	Civil Service Fast Stream civil-service-careers.gov.uk Talent management program for graduates with leadership potential in the Civil Service, providing opportunities to make an impact on people's lives	Government Administration	🇬🇧 London	1,443	n/a
42	London Borough of Bromley bromley.gov.uk Local government providing housing, regeneration, safety, health, and support services to foster independent, thriving, and vibrant communities.	Government Administration	🇬🇧 London	1,388	1965
43	Historic England historicengland.org.uk This organization protects and celebrates England's historic environment, working with communities to inspire interest, care, and conservation for future generations	Government Administration	🇬🇧 London	1,278	2015
44	Royal Borough of Kingston upon Thames kingston.gov.uk Community-focused authority providing essential services to enhance quality of life, promote sense of community, and attract residents, visitors, businesses, and government investment in Kingston borough	Government Administration	🇬🇧 London	1,262	n/a
45	Foreign and Commonwealth Office linkedin.com This channel provided updates on UK foreign policy and development work It is no longer active, but you can follow Foreign, Commonwealth and Development Office for current information	Government Administration	🇬🇧 London	1,236	n/a
46	Ministry of Housing, Communities and Local Government - Legacy gov.uk The company is closed Visit the Department for Levelling Up, Housing and Communities for similar services	Government Administration	🇬🇧 London	1,167	n/a
47	Competition and Markets Authority linktr.ee The company is the UK's competition authority, ensuring fair competition in various sectors to protect consumers and businesses	Government Administration	🇬🇧 London	938	2014
48	UK House of Lords parliament.uk A dynamic workplace in the UK Parliament's second chamber, where members shape laws, check government work, and bring diverse expertise to committees	Government Administration	🇬🇧 London	884	n/a
49	The Insolvency Service gov.uk The company provides a framework for dealing with financial failure and misconduct, maintains insolvency laws, delivers public services, and enforces regulations	Government Administration	🇬🇧 London	858	n/a
50	Security Industry Authority gov.uk Regulating the private security industry in the UK by licensing individuals and managing the Approved Contractor Scheme to ensure high standards	Government Administration	🇬🇧 London	836	2003
51	The British Army army.mod.uk A highly trained army protecting the UK and its territories, ready to deploy globally to prevent conflict and support national interests	Government Administration	🇬🇧 London	823	1660
52	Shared Services Connected Ltd sscl.com Providing business-critical support services and digital solutions to UK public sector, improving customer experience and delivering significant savings.	Government Administration	🇬🇧 London	818	2013
53	Department for Business, Innovation and Skills gov.uk Creating a competitive UK economy by supporting business success, innovation, education, and a global economy through fostering world-class universities	Government Administration	🇬🇧 London	608	2009
54	Government Actuary's Department gov.uk Actuarial solutions provider specializing in financial risk analysis, modeling, and advice to enhance stewardship of UK public sector finances	Government Administration	🇬🇧 London	433	1919
55	The National Lottery Heritage Fund heritagefund.org.uk The organization funds heritage projects in the UK, distributes National Lottery grants, provides leadership and support in the heritage sector	Government Administration	🇬🇧 London	406	1994
56	Justice Digital, Data and Science jobtrain.co.uk Justice Digital specializes in developing a digitally-enabled justice system, focusing on user needs to create adaptable and effective services Talented individuals are sought to join the team	Government Administration	🇬🇧 London	395	n/a
57	10 Downing Street gov.uk Government office responsible for the leadership and administration of the United Kingdom, headed by the Prime Minister at No 10 Downing Street	Government Administration	🇬🇧 London	376	1730
58	Office of Rail and Road (ORR)orr.gov.uk Protect rail and road users by regulating safety, performance, funding, competition, and consumer protection for railways and strategic roads.	Government Administration	🇬🇧 London	342	2003
59	Housing Ombudsman housing-ombudsman.org.uk The company resolves disputes between housing providers and tenants, promoting fair and impartial resolution while encouraging learning and improving relationships	Government Administration	🇬🇧 London	327	1997
60	Government Commercial Function gov.uk The Government Commercial Function aims to transform commercial capability across the UK Civil Service through specialized support and continuous improvement	Government Administration	🇬🇧 London	311	n/a
61	Judicial Appointments Commission judicialappointments.gov.uk An independent body in England and Wales that selects candidates for judicial roles through fair and open competition, aiming to attract diverse applicants	Government Administration	🇬🇧 London	188	2006
62	Architects Registration Board arb.org.uk The company is the UK's independent regulator of architects, ensuring qualifications, conduct, and practice standards are met to protect the public	Government Administration	🇬🇧 London	178	1997
63	Parole Board for England and Wales gov.uk An autonomous organization that evaluates the readiness of prisoners for reentry into society, ensuring a safe transition post-incarceration	Government Administration	🇬🇧 London	170	n/a
64	Page Government administration company in London, UK, located at STRAND Serving the public through the Royal Courts Of Justice	Government Administration	🇬🇧 London	156	n/a
65	The Book People Ltd thebookpeople.co.uk The company is being administered by licensed insolvency practitioners to manage its affairs, business, property, and personal data securely	Government Administration	🇬🇧 London	150	1988
66	Government Economic Service gov.uk Professional body representing over 4000 economists in UK civil service, ensuring policy is informed by top economic analysis across government departments and agencies	Government Administration	🇬🇧 London	148	1964
67	Office of Government Commerce ogc.gov.uk A government office focused on delivering value for money, managing projects efficiently, reducing carbon emissions, supporting SMEs, and improving government capabilities	Government Administration	🇬🇧 London	54	2000

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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Oct 10, 2026.

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The same list elsewhere in United Kingdom

Government Administration companies in the United Kingdom 395