List of public utilities
{{Short description|none}}
This is a list of public utilities.
[[Natural gas]] companies
- {{flag|Barbados}} - National Petroleum Corporation, Barbados National Oil Company Ltd.
- {{flag|Brazil}} - Comgás
- {{flag|Canada}} - List of Canadian natural gas companies
- {{flag|China}} - China Natural Gas, Towngas China
- {{flag|Hong Kong}} - China Resources Gas, The Hong Kong and China Gas Company
- {{flag|Egypt}} - EGAS
- {{flag|France}} - List of French natural gas companies
- {{flag|Japan}} - List of Japan natural gas companies
- {{flag|Malaysia}} - Petronas
- {{flag|Pakistan}} - Sui Northern Gas Pipelines Limited, Sui Southern Gas Company Limited
- {{flag|Spain}} - Endesa, Iberdrola, Naturgy, Repsol, TotalEnergies
- {{flag|Taiwan}} - CPC Corporation
- {{flag|Thailand}} - PTT
- {{flag|United Kingdom}} - List of British natural gas companies
- {{flag|United States}} - List of United States natural gas companies
Electricity companies
- {{flag|Australia}} - Lumo Energy, EnergyAustralia, Origin Energy, TRUenergy, SEC Victoria (fmr.), Powercor, Click Energy, AGL, Alinta, Citipower, ETSA Utilities, Western Power, Country Energy, Energex, Integral Energy, ActewAGL, Ergon Energy, Power and Water
- {{flag|Bangladesh}} - Summit Group, Power Grid Company of Bangladesh Ltd, Electricity Generation Company of Bangladesh Ltd
- {{flag|Barbados}} - Barbados Light and Power Company Ltd.
- {{flag|Belgium}} - Electrabel
- {{flag|Botswana}} - Botswana Power Corporation
- {{flag|Brazil}} - Eletrobrás, AES Eletropaulo, CPFL Energia, Celesc, CEMIG, CESP, Copel, Light S.A., CEEE, Energisa
- {{flag|Canada}} - List of Canadian electric utilities
- {{flag|China}} - State Grid Corporation, China Southern Power Grid
- {{flag|Hong Kong}} - Hongkong Electric, CLP Power
- {{flag|Macau}} - Companhia de Electricidade de Macau
- {{flag|Cuba}} - Union Electrica
- {{flag|Czech Republic}} - CEZ Group
- {{flag|Egypt}} - Egyptian Electricity Holding Company
- {{flag|Ethiopia}} - Ethiopian Electric Power Corporation
- {{flag|Finland}} - Fortum
- {{flag|France}} - EDF, Engie, List of French electric utilities
- {{flag|Germany}} - E.ON, RWE, EnBW
- {{flag|Greece}} - PPC (DEI) (Greek Hydro), List of electric power companies in Greece
- {{flag|Iceland}} - Orkuveita Reykjavíkur
- {{flag|India}} - List of Electricity Organizations in India, India: NTPC, Power Grid Corporation of India Ltd.(PGCIL), KPTCL, MSEB, Tata Power, BSES Rajdhani Power Ltd New Delhi, BSES Yamuna Power Ltd New Delhi
- {{flag|Indonesia}} - Perusahaan Listrik Negara
- {{flag|Italy}} - Enel, Edison, A2A, ACEA, Hera, Sorgenia
- {{flag|Japan}} - Kansai Electric Power, Tokyo Electric Power, Chubu Electric Power, Chugoku Electric Power, Hokuriku Electric Power, Hokkaido Electric Power, Kyushu Electric Power, Tohoku Electric Power, Shikoku Electric Power, Okinawa Electric Power, J-POWER
- {{flag|Libya}} - Gecol
- {{flag|Malaysia}} - Tenaga Nasional Berhad
- {{flag|New Zealand}} - Genesis Energy, Mercury Energy, Meridian Energy, Transpower
- Norway - Statnett
- {{flag|Philippines}} - Meralco
- {{flag|Singapore}} - Singapore Power
- {{flag|South Africa}} - Eskom
- {{flag|South Korea}} - Korea Electric Power Corporation
- {{flag|Spain}} - Endesa, Iberdrola, Naturgy, Repsol, TotalEnergies
- {{flag|Sweden}} - Vattenfall
- {{flag|Taiwan}} - Taiwan Power Company
- {{flag|Thailand}} - Electricity Generating Authority of Thailand, Provincial Electricity Authority, Metropolitan Electricity Authority
- {{flag|United Kingdom}} - EDF Energy, E.ON UK, National Grid, RWE npower, ScottishPower, Scottish and Southern Energy, Drax Power and Good Energy, Ecotricity, Alkane Energy, Ovo Energy
- {{flag|United States}} - List of United States electric companies
[[Telephone]] companies
- {{flag|Australia}} - Telstra, Optus, Vodafone, Hutchison Telecom(3G network), AAPT, Primus Telecom, Nextgen Networks, Agile Communications, TransACT
- {{flag|Barbados}} - Liberty Latin America
- {{flag|Botswana}} - Botswana Telecommunications Corporation
- {{flag|Brazil}} - Brasil Telecom, Oi, Vivo, TIM, Telefónica Brasil
- {{flag|Canada}} - List of Canadian telephone companies
- {{flag|China}}
- {{flag|Hong Kong}} - PCCW Limited, New World Telephone, Hutchison Telecom
- {{flag|Macau}} - Companhia de Telecomunicações de Macau
- {{flag|Cuba}} - ETECSA
- {{flag|Egypt}} - telecom egypt, orange egypt, vodafone egypt, etisalat egypt
- {{flag|France}} - List of French telephone companies
- {{flag|Germany}} - Deutsche Telekom, Arcor AG, Freenet AG, T-Mobile, Vodafone Germany,{{ill|1&1 Aktiengesellschaft|de}}1&1 Drillisch
- {{flag|Greece}} - Hellenic Telecommunication Organization
- {{flag|India}} - Airtel, BSNL, MTNL, Vodafone Idea, Jio
- {{flag|Indonesia}} - Telkom
- {{flag|Ireland}} - Eircom, BT Ireland, Smart Telecom, Vodafone Ireland, Hutchison 3G, O2 (Telefónica Europe)
- {{flag|Italy}} - List of Italian telephone companies
- {{flag|Japan}} - NTT, (NTT East, and NTT West)
- {{flag|Malaysia}} - Telekom Malaysia
- {{flag|Pakistan}} - Mobilink, Ufone, Telenor, Zong
- {{flag|Philippines}} - Philippine Long Distance Telephone Company
- {{flag|Singapore}} - SingTel
- {{flag|South Africa}} - Telkom
- {{flag|Spain}} - Telefónica, Orange, Vodafone, Yoigo
- {{flag|Taiwan}} - Chunghwa Telecom, FarEasTone, Taiwan Mobile
- {{flag|Thailand}} - TOT, CAT Telecom, True Corporation, DTAC, AIS, JAS Mobile
- {{flag|United States}} - List of United States telephone companies
[[Water]] companies
- {{flag|Australia}} - Unitywater, Queensland Urban Utilities
- {{flag|Barbados}} - Barbados Water Authority
- {{flag|Botswana}} - Water Utilities Corporation
- {{flag|Brazil}} - Sabesp, Sanepar, Copasa, Semasa
- {{flag|China}}
- {{flag|Hong Kong}} - Water Supplies Department
- {{flag|Macau}} - Macao Water
- {{flag|Egypt}} - Holding company for water and wastewater, Alexandria Water Company
- {{flag|France}} - SAUR, Suez Environnement, Veolia Environnement
- {{flag|Greece}} - EYDAP
- {{flag|Ireland}} - Irish Water
- {{flag|Italy}} - Hera, Seabo
- {{flag|Philippines}} - Maynilad Water Services, Manila Water Company, Inc., Metropolitan Waterworks and Sewerage System
- {{flag|Spain}} - Canal de Isabel II, Grupo Agbar
- {{flag|Taiwan}} - Taiwan Water Corporation
- {{flag|United Kingdom}} - List of United Kingdom water companies
- {{flag|United States}} - List of United States water companies
Steam companies
:Note: some of these companies are still trading, others are listed here for historical interest.
Former hydraulic power companies
- Itaipú Binacional *{{flag|Brazil}}
- Liverpool Hydraulic Power Company *{{flag|UK}}
- London Hydraulic Power Company, defunct since 1977 *{{flag|UK}}