Many nations implement competition laws, and there is general agreement on acceptable standards of behavior. The degree to which countries enforce their competition policy varies substantially.
Competition regulators may also regulate certain aspects of mergers and acquisitions and business alliances and regulate or prohibit cartels and monopolies. Other government agencies may have responsibilities in relation to aspects of competition law which affect companies (e.g. the registrar of companies).
Regulators may form supranational or international alliances like the ECA (European Competition Authorities), the ICN (International Competition Network), and the OECD (Organisation for Economic Co-operation and Development).
| Flag | Country | Name | ECA | ICN | OECD | Website | Language | | {{flagicon|Albania}} | Albania | Competition Authority of Albania | [https://web.archive.org/web/20080623215359/http://www.caa.gov.al/default.asp?l=1] | English |
| {{flagicon|Algeria}} | Algeria | The Algerian National Competition Council | | Arabic, French |
| {{flagicon|Argentina}} | Argentina | Comision Nacional de Defensa de la Competencia | [https://web.archive.org/web/20060118155047/http://www.mecon.gov.ar/cndc/home.htm] | Spanish |
| {{flagicon|Australia}} | Australia | Australian Competition and Consumer Commission and National Competition Council | [https://web.archive.org/web/20120115065657/http://www.accc.gov.au/content/index.phtml/itemId/142] | English |
| {{flagicon|Austria}} | Austria | Wettbewerbsbehörde im BMwA | [https://web.archive.org/web/20060102100448/http://www.bwb.gv.at/BWB/English/default.htm] | English |
| {{flagicon|Belgium}} | Belgium | Raad voor de Mededinging/Conseil de la concurrence | [https://www.abc-bma.be/fr] | French/Dutch |
| {{flagicon|Brazil}} | Brazil | Conselho Administrativo de Defesa Economica | | Portuguese |
| {{flagicon|Bulgaria}} | Bulgaria | Commission for Protection of Competition | | Bulgarian/English |
| {{flagicon|Canada}} | Canada | Competition Bureau/Bureau de la concurrence | , | English/French |
| {{flagicon|Chile}} | Chile | Tribunal de Defensa de la Libre Competencia -National Economic Prosecutor's Office | | Spanish |
| {{flagicon|People's Republic of China}} | China | Ministry of Commerce | | English |
| {{flagicon|Colombia}} | Colombia | Superintendency of Industry and Commerce | | Spanish |
| {{flagicon|Croatia}} | Croatia | Croatian Competition Agency | | English |
| {{flagicon|Cyprus}} | Cyprus | Commission for the Protection of Competition | | English |
| {{flagicon|Czech Republic}} | Czech Republic | Office for the Protection of Competition | [https://web.archive.org/web/20060115150207/http://www.compet.cz/EngVer.htm] | English |
| {{flagicon|Denmark}} | Denmark | Konkurrencestyrelsen | [https://web.archive.org/web/20060205031022/http://www.ks.dk/english/] | English |
| {{flagicon|El Salvador}} | El Salvador | Superintendencia de Competencia | | Spanish |
| {{flagicon|Estonia}} | Estonia | konkurentsiamet | [https://web.archive.org/web/20060117050824/http://www.konkurentsiamet.ee/eng/] |
| {{flagicon|Finland}} | Finland | Finnish Competition Authority (Kilpailuvirasto) | | English |
| {{flagicon|France}} | France | Autorité de la concurrence | | French |
| {{flagicon|Georgia}} | Georgia | Competition Agency | | Georgian, English, Russian |
| {{flagicon|Germany}} | Germany | Bundeskartellamt | [https://web.archive.org/web/20070629173140/http://www.bundeskartellamt.de/wEnglisch/index.php] | German |
| {{flagicon|Greece}} | Greece | Hellenic Competition Commission | | English |
| {{flagicon|HKG}} | Hong Kong | Competition Commission | [https://www.compcomm.hk/index.html] | Cantonese/English |
| {{flagicon|Hungary}} | Hungary | Office of Economic Competition (Gazdasági Versenyhivatal) | [https://web.archive.org/web/20051224064421/http://www.gvh.hu/index.php?l=e&m=1&id=78] | English |
| {{flagicon|India}} | India | Competition Commission of India | | English |
| {{flagicon|Indonesia}} | Indonesia | Commission for Supervision of Business Competition, (Komisi Pengawas Persaingan Usaha), | | English |
| {{flagicon|Ireland}} | Ireland | The Competition Authority, (TCA), | | English |
| {{flagicon|Iceland}} | Iceland | Icelandic Competition Authority | [https://web.archive.org/web/20050307134808/http://www.samkeppni.is/english/ensksida.htm] | English |
| {{flagicon|Israel}} | Israel | Israel Anti-trust Authority | | English |
| {{flagicon|Italy}} | Italy | Autorità Garante della Concorrenza e del Mercato (AGCM) | [https://web.archive.org/web/20060208121334/http://www.agcm.it/eng/index.htm] | English |
| {{flagicon|Japan}} | Japan | Japan Fair Trade Commission (JFTC) | [https://web.archive.org/web/20060131011006/http://www.jftc.go.jp/e-page/index.html] | English |
| {{flagicon|Jersey}} | Jersey | Jersey Competition Regulatory Authority, (JCRA), | | English |
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| {{flagicon|Jordan}} | Jordan | Competition Directorate at the Ministry of Industry and Trade | [https://web.archive.org/web/20140319174747/http://www.mit.gov.jo/tabid/36/default.aspx] | English |
| {{flagicon|Kazakhstan}} | Kazakhstan | Agency of the Republic of Kazakhstan for regulation of natural monopolies and Agency of the Republic of Kazakhstan for Competition Protection (Antimonopoly Agency) | | English |
| {{flagicon|Kenya}} | Kenya | Monopolies and Prices Commission of Kenya | [https://web.archive.org/web/20060111011306/http://www.treasury.go.ke/monopolies.html] | English |
| {{flagicon|Kosovo}} | Kosovo | Kosovo Competition Commission | | English, Albanian, Serbian |
| {{flagicon|Latvia}} | Latvia | Competition Council | [https://web.archive.org/web/20060102042434/http://www.competition.lv/?l=2] | English |
| {{flagicon|Liechtenstein}} | Liechtenstein | Office of National Economy (Amt für Volkswirtschaft) | [https://web.archive.org/web/20051225182650/http://www.avw.llv.li/] | German |
| {{flagicon|Lithuania}} | Lithuania | Competition Council | | English |
| {{flagicon|Luxembourg}} | Luxembourg | Conseil de la concurrence - Inspection de la Concurrence | | French |
| {{flagicon|Macedonia}} | Macedonia | Commission for Protection of Competition | | English |
| {{flagicon|Malaysia}} | Malaysia | Malaysia Competition Commission | [https://web.archive.org/web/20111127155827/http://www.mycc.gov.my/Web/Home.aspx] | English |
| {{flagicon|Malta}} | Malta |
| {{flagicon|Mexico}} | Mexico | Mexican Federal Competition Commission | [https://web.archive.org/web/20050810234551/http://www.cfc.gob.mx/ing_inicio.asp] | English |
| {{flagicon|Republic of Moldova}} | Republic of Moldova | Consiliul Concurenței (Competition Council) | [https://web.archive.org/web/20180908142741/https://competition.md/] | English |
| {{flagicon|Netherlands}} | Netherlands | Autoriteit Consument & Markt | | English |
| {{flagicon|New Zealand}} | New Zealand | Competition and Enterprise Branch and New Zealand Commerce Commission | [https://web.archive.org/web/20081014072127/http://www.comcom.govt.nz//PublicRegisters/ContentFiles/Documents/ANZ.pdf] | English |
| {{flagicon|Norway}} | Norway | Konkurransetilsynet | [https://web.archive.org/web/20051118185017/http://www.konkurransetilsynet.no/internett/index.asp?LanguageCode=9] | English |
| {{flagicon|Pakistan}} | Pakistan | Competition Commission of Pakistan | | Urdu |
| {{flagicon|Peru}} | Peru | Free Competition Commission | | Spanish |
| {{flagicon|Philippines}} | Philippines | Philippine Competition Commission | | English |
| {{flagicon|Poland}} | Poland | Office for Competition and Consumer Protection | | English |
| {{flagicon|Portugal}} | Portugal | Autoridade da Concorrência | | English |
| {{flagicon|Romania}} | Romania | Consiliul Concurenței (Competition Council) | | English |
| {{flagicon|Russia}} | Russia | Federal Antimonopoly Service of Russia | [https://web.archive.org/web/20090731162153/http://www.fas.gov.ru/english/] | English |
| {{flagicon|Singapore}} | Singapore | Competition Commission of Singapore | ] | Russian |
| {{flagicon|Slovakia}} | Slovakia | Antimonopoly Office | | English |
| {{flagicon|Slovenia}} | Slovenia | Competition Protection Office of the Republic of Slovenia | {{dead link>date=August 2017 |bot=InternetArchiveBot |fix-attempted=yes }} | English |
| {{flagicon|South Africa}} | South Africa | Competition Commission of South Africa, South African Competition Tribunal | | English |
| {{flagicon|South Korea}} | South Korea | Fair Trade Commission | | English |
| {{flagicon|Spain}} | Spain | Comisión Nacional de la Competencia (CNC) before September 2007 Tribunal de Defensa de la Competencia (TDC) | | Spanish |
| {{flagicon|Sweden}} | Sweden | Konkurrensverket | [https://web.archive.org/web/20060108112718/http://www.kkv.se/eng/eng_index.shtm] | English |
| {{flagicon|Switzerland}} | Switzerland | The Competition Council en Switzerland Swiss Competition Commission | [https://web.archive.org/web/20051127102241/http://www.weko.admin.ch/index.html?lang=en] | German, French, Italian |
| {{flagicon|Republic of China}} | Taiwan | Fair Trade Commission (Republic of China) | | English |
| {{flagicon|Turkey}} | Turkey | Rekabet Kurumu | | English |
| {{flagicon|Ukraine}} | Ukraine | Anti-Monopoly Committee (Ukraine) | [https://web.archive.org/web/20120119205857/http://www.amc.gov.ua/amc/control/en/publish/article?art_id=44798] | English |
| {{flagicon|United Kingdom}} | United Kingdom | Competition and Markets Authority | [https://www.gov.uk/government/organisations/competition-and-markets-authority] | English |
| {{flagicon|United States}} | United States | Federal Trade Commission and U.S. Department of Justice Antitrust Division | | English |
| {{flagicon|Venezuela}} | Venezuela | Pro-Competencia | [https://web.archive.org/web/20060112064355/http://www.procompetencia.gov.ve/] | Spanish |
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