This is a list of public utilities.

Natural gas companies

  • - National Petroleum Corporation, Barbados National Oil Company Ltd.
  • - Comgás
  • - List of Canadian natural gas companies
  • - China Natural Gas, Towngas China
  • - China Resources Gas, The Hong Kong and China Gas Company
  • - EGAS
  • - List of French natural gas companies
  • - List of Japan natural gas companies
  • - Petronas
  • - Sui Northern Gas Pipelines Limited, Sui Southern Gas Company Limited
  • - Endesa, Iberdrola, Naturgy, Repsol, TotalEnergies
  • - CPC Corporation
  • - PTT
  • - List of British natural gas companies
  • - List of United States natural gas companies

Electricity companies

  • - 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
  • - Summit Group, Power Grid Company of Bangladesh Ltd, Electricity Generation Company of Bangladesh Ltd
  • - Barbados Light and Power Company Ltd.
  • - Electrabel
  • - Botswana Power Corporation
  • - Eletrobrás, AES Eletropaulo, CPFL Energia, Celesc, CEMIG, CESP, Copel, Light S.A., CEEE, Energisa
  • - List of Canadian electric utilities
  • - State Grid Corporation, China Southern Power Grid
  • - Hongkong Electric, CLP Power
  • - Companhia de Electricidade de Macau
  • - Union Electrica
  • - CEZ Group
  • - Egyptian Electricity Holding Company
  • - Ethiopian Electric Power Corporation
  • - Fortum
  • - EDF, Engie, List of French electric utilities
  • - E.ON, RWE, EnBW
  • - PPC (DEI) (Greek Hydro), List of electric power companies in Greece
  • - Orkuveita Reykjavíkur
  • - 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
  • - Perusahaan Listrik Negara
  • - Enel, Edison, A2A, ACEA, Hera, Sorgenia
  • - 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
  • - Gecol
  • - Tenaga Nasional Berhad
  • - Genesis Energy, Mercury Energy, Meridian Energy, Transpower
  • Norway - Statnett
  • - Meralco
  • - Singapore Power
  • - Eskom
  • - Korea Electric Power Corporation
  • - Endesa, Iberdrola, Naturgy, Repsol, TotalEnergies
  • - Vattenfall
  • - Taiwan Power Company
  • - Electricity Generating Authority of Thailand, Provincial Electricity Authority, Metropolitan Electricity Authority
  • - EDF Energy, E.ON UK, National Grid, RWE npower, ScottishPower, Scottish and Southern Energy, Drax Power and Good Energy, Ecotricity, Alkane Energy, Ovo Energy
  • - List of United States electric companies

Telephone companies

  • - Telstra, Optus, Vodafone, Hutchison Telecom(3G network), AAPT, Primus Telecom, Nextgen Networks, Agile Communications, TransACT
  • - Liberty Latin America
  • - Botswana Telecommunications Corporation
  • - Brasil Telecom, Oi, Vivo, TIM, Telefónica Brasil
  • - List of Canadian telephone companies
  • - PCCW Limited, New World Telephone, Hutchison Telecom
  • - Companhia de Telecomunicações de Macau
  • - ETECSA
  • - telecom egypt, orange egypt, vodafone egypt, etisalat egypt
  • - List of French telephone companies
  • - Deutsche Telekom, Arcor AG, Freenet AG, T-Mobile, Vodafone Germany,1&1 Drillisch
  • - Hellenic Telecommunication Organization
  • - Airtel, BSNL, MTNL, Vodafone Idea, Jio
  • - Telkom
  • - Eircom, BT Ireland, Smart Telecom, Vodafone Ireland, Hutchison 3G, O2 (Telefónica Europe)
  • - List of Italian telephone companies
  • - NTT, (NTT East, and NTT West)
  • - Telekom Malaysia
  • - Mobilink, Ufone, Telenor, Zong
  • - Philippine Long Distance Telephone Company
  • - SingTel
  • - Telkom
  • - Telefónica, Orange, Vodafone, Yoigo
  • - Chunghwa Telecom, FarEasTone, Taiwan Mobile
  • - TOT, CAT Telecom, True Corporation, DTAC, AIS, JAS Mobile
  • - List of United States telephone companies

Water companies

  • - Unitywater, Queensland Urban Utilities
  • - Barbados Water Authority
  • - Water Utilities Corporation
  • - Sabesp, Sanepar, Copasa, Semasa
  • - Water Supplies Department
  • - Macao Water
  • - Holding company for water and wastewater, Alexandria Water Company
  • - SAUR, Suez Environnement, Veolia Environnement
  • - EYDAP
  • - Irish Water
  • - Hera, Seabo
  • - Maynilad Water Services, Manila Water Company, Inc., Metropolitan Waterworks and Sewerage System
  • - Canal de Isabel II, Grupo Agbar
  • - Taiwan Water Corporation
  • - List of United Kingdom water companies
  • - List of United States water companies

Steam companies

:Note: some of these companies are still trading, others are listed here for historical interest.

  • American District Steam Company
  • Boston Heating Company
  • Compagnie Parisienne de Chauffage Urbain
  • Detroit Thermal
  • New York Steam Company, now Con Edison Steam Operations
  • Trigen Energy Corporation

Former hydraulic power companies

  • Itaipú Binacional *
  • Liverpool Hydraulic Power Company *
  • London Hydraulic Power Company, defunct since 1977 *

See also

  • Off-the-grid