Flag | Country | Name | ECA | ICN | OECD | Website | Language |
| Albania | Competition Authority | | | | [4] | Albanian, English |
| Algeria | The Algerian National Competition Council | | | | [5] | Arabic, French |
| Argentina | Comision Nacional de Defensa de la Competencia | | | | [6] | Spanish |
| Armenia | State Commission for the Protection of Economic Competition of Armenia | | | | [7] | Armenian, English |
| Australia | Australian Competition & Consumer Commission | | | | [8] [9] | English |
| Austria | Wettbewerbsbehörde im BMwA | | | | [10] | German, English |
| Barbados | Fair Trading Commission | | | | [11] | English |
| Belgium | Raad voor de Mededinging/Conseil de la concurrence | | | | [12] | French/Dutch |
| Brazil | Administrative Council for Economic Defense | | | | [13] | Portuguese |
| Bulgaria | Commission for Protection of Competition | | | | [14] | Bulgarian/English |
| Canada | Competition Bureau/Bureau de la concurrence | | | | [15], [16] | English/French |
| Chile | Tribunal de Defensa de la Libre Competencia -National Economic Prosecutor's Office | | | | [17] | Spanish |
| China | State Administration for Market Regulation | | | | [18] | Chinese |
| Colombia | Superintendency of Industry and Commerce | | | | [19] Archived April 22, 2018, at the Wayback Machine | Spanish |
| Croatia | Croatian Competition Agency | | | | [20] | Croatian, English |
| Curaçao | Fair Trade Authority Curaçao | | X | | [@] | English, Dutch, Papiamentu |
| Cyprus | Commission for the Protection of Competition | | | | [21] | Greek, English |
| Czech Republic | Office for the Protection of Competition | | | | [22] | Czech, English |
| Denmark | Konkurrencestyrelsen | | | | [23] | Danish, English |
| El Salvador | Superintendencia de Competencia | | | | [24] | Spanish |
| Estonia | Konkurentsiamet (Estonian Competition Authority) | | | | [25] | Estonian, English |
| Finland | Finnish Competition and Consumer Authority (Kilpailuvirasto) | | | | [26] | Finnish, English |
| France | Autorité de la concurrence | | | | [27] | French |
| Georgia | Competition Agency | | | | [28] | Georgian, English |
| Germany | Bundeskartellamt | | | | [29] | German |
| Greece | Hellenic Competition Commission | | | | [30] | Greek, English |
| Hong Kong | Competition Commission | | | | [31] | Cantonese/English |
| Hungary | Office of Economic Competition (Gazdasági Versenyhivatal) | | | | [32] | Hungarian, English |
| India | Competition Commission of India | | | | [33] | English |
| Indonesia | Commission for Supervision of Business Competition, (Komisi Pengawas Persaingan Usaha), | | | | [34] | Indonesian, English |
| Ireland | Competition and Consumer Protection Commission | | | | [35] | English, Irish |
| Iceland | Icelandic Competition Authority | | | | [36] | Icelandic, English |
| Iran | National Iranian Competition Center (NICC) | | | | [37] | Persian |
| Israel | Israel Anti-trust Authority | | | | [38] | Hebrew, English |
| Italy | Autorità Garante della Concorrenza e del Mercato (AGCM) | | | | [39] | Italian, English |
| Japan | Japan Fair Trade Commission (JFTC) | | | | [40] | Japanese, English |
| Jersey | Jersey Competition Regulatory Authority (JCRA) | | | | [41] | English |
| Jordan | Competition Directorate at the Ministry of Industry and Trade | | | | [42] | Arabic, English |
| Kazakhstan | Agency of the Republic of Kazakhstan for Regulation of Natural Monopolies and Agency of the Republic of Kazakhstan for Competition Protection (Antimonopoly Agency) | | | | [43] [44] | Kazakh, English |
| Kenya | Monopolies and Prices Commission of Kenya | | | | [45] | English |
| Kosovo | Kosovo Competition Commission | | | | [46] | English, Albanian, Serbian |
| Latvia | Competition Council of Latvia (Konkurences padome) | | | | [47] | Latvian, English |
| Liechtenstein | Office of National Economy (Amt für Volkswirtschaft) | | | | [48] | German |
| Lithuania | Competition Council (Konkurencijos taryba) | | | | [49] | Lithuanian, English |
| Luxembourg | Conseil de la concurrence - Inspection de la Concurrence | | | | [50] | French |
| Malaysia | Malaysia Competition Commission | | | | [51] | English |
| Malta | Malta Competition and Consumer Affairs Authority | | | | [52] | English |
| Mexico | Mexican Federal Competition Commission | | | | [53] | Spanish, English |
| Republic of Moldova | Consiliul Concurenței (Competition Council) | | | | [54] | Romanian, English |
| Netherlands | Autoriteit Consument & Markt | | | | [55] | Dutch, English |
| New Zealand | Ministry of Commerce: Competition and Enterprise Branch and New Zealand Commerce Commission | | | | [56] | English, Māori |
| Nigeria | Federal Competition and Consumer Protection Commission | | | | [57] | English |
| North Macedonia | Commission for Protection of Competition (Комисијата за заштита на конкуренцијата) | | | | [58] | Macedonian, English |
| Norway | Konkurransetilsynet | | | | [59] | Norwegian, English |
| Pakistan | Competition Commission of Pakistan | | | | [60] | Urdu |
| Peru | Free Competition Commission | | | | [61] | Spanish |
| Philippines | Philippine Competition Commission | | | | [62] | English |
| Poland | Office for Competition and Consumer Protection (Urząd Ochrony Konkurencji i Konsumentów) | | | | [63] | Polish, English |
| Portugal | Autoridade da Concorrência | | | | [64] | English, Portuguese |
| Romania | Consiliul Concurenței (Competition Council) | | | | [65] Archived October 25, 2008, at the Wayback Machine | Romanian, English |
| Russia | Federal Antimonopoly Service of Russia | | | | [66] Archived February 10, 2020, at the Wayback Machine | Russian, English |
| Singapore | Competition and Consumer Commission of Singapore | | | | [67] | English |
| Slovakia | Antimonopoly Office | | | | [68] | Slovak, English |
| Slovenia | Slovenian Competition Protection Agency | | | | [69] | Slovenian, English |
| South Africa | Competition Commission, South African Competition Tribunal | | | | [70] [71] | English |
| South Korea | Fair Trade Commission | | | | [72] | Korean, English |
| Spain | Comisión Nacional de la Competencia (CNC) before September 2007 Tribunal de Defensa de la Competencia (TDC) | | | | [73] | Spanish |
| Sweden | Konkurrensverket | | | | [74] | Swedish, English |
| Switzerland | The Competition Council and Competition Commission (COMCO) | | | | [75] | German, French, Italian |
| Taiwan | Fair Trade Commission | | | | [76] | Mandarin, English |
| Thailand | Trade Competition Commission | | | | [77] | Thai, English |
| Turkey | Rekabet Kurumu | | | | [78] | Turkish, English |
| Ukraine | Anti-Monopoly Committee | | | | [79] | Ukrainian, English |
| United Kingdom | Competition and Markets Authority | | | | [80] | English |
| United States | Federal Trade Commission & United States Department of Justice Antitrust Division | | | | [81] [82] | English |
| Venezuela | Pro-Competencia | | | | [83] | Spanish |