The PCT now has 158 Contracting States
| Two-Letter Code |
Name of State | Date on Which State Became Bound by the PCT1 |
|---|---|---|
| AE | United Arab Emirates | 10 March 1999 |
| AG | Antigua and Barbuda | 17 March 2000 |
| AL | Albania | 4 October 1995 |
| AM | Armenia2 | 25 December 1991 |
| AO | Angola | 27 December 2007 |
| AT | Austria | 23 April 1979 |
| AU | Australia | 31 March 1980 |
| AZ | Azerbaijan | 25 December 1995 |
| BA | Bosnia and Herzegovina | 7 September 1996 |
| BB | Barbados | 12 March 1985 |
| BE | Belgium | 14 December 1981 |
| BF | Burkina Faso | 21 March 1989 |
| BG | Bulgaria | 21 May 1984 |
| BH | Bahrain2 | 18 March 2007 |
| BJ | Benin | 26 February 1987 |
| BN | Brunei Darussalam | 24 July 2012 |
| BR | Brazil | 9 April 1978 |
| BW | Botswana | 30 October 2003 |
| BY | Belarus2 | 25 December 1991 |
| BZ | Belize | 17 June 2000 |
| CA | Canada | 2 January 1990 |
| CF | Central African Republic | 24 January 1978 |
| CG | Congo | 24 January 1978 |
| CH | Switzerland | 24 January 1978 |
| CI | Côte d'Ivoire | 30 April 1991 |
| CL | Chile2 | 2 June 2009 |
| CM | Cameroon | 24 January 1978 |
| CN | China3, 4 | 1 January 1994 |
| CO | Colombia | 28 February 2001 |
| CR | Costa Rica | 3 August 1999 |
| CU | Cuba2 | 16 July 1996 |
| CV | Cabo Verde | 6 July 2022 |
| CY | Cyprus | 1 April 1998 |
| CZ | Czechia | 1 January 1993 |
| DE | Germany | 24 January 1978 |
| DJ | Djibouti | 23 September 2016 |
| DK | Denmark | 1 December 1978 |
| DM | Dominica | 7 August 1999 |
| DO | Dominican Republic | 28 May 2007 |
| DZ | Algeria2 | 8 March 2000 |
| EC | Ecuador | 7 May 2001 |
| EE | Estonia | 24 August 1994 |
| EG | Egypt | 6 September 2003 |
| ES | Spain | 16 November 1989 |
| FI | Finland5 | 1 October 1980 |
| FR | France2, 6 | 25 February 1978 |
| GA | Gabon | 24 January 1978 |
| GB | United Kingdom7 | 24 January 1978 |
| GD | Grenada | 22 September 1998 |
| GE | Georgia2 | 25 December 1991 |
| GH | Ghana | 26 February 1997 |
| GM | Gambia | 9 December 1997 |
| GN | Guinea | 27 May 1991 |
| GQ | Equatorial Guinea | 17 July 2001 |
| GR | Greece | 9 October 1990 |
| GT | Guatemala | 14 October 2006 |
| GW | Guinea-Bissau | 12 December 1997 |
| HN | Honduras | 20 June 2006 |
| HR | Croatia | 1 July 1998 |
| HU | Hungary2 | 27 June 1980 |
| ID | Indonesia2 | 5 September 1997 |
| IE | Ireland | 1 August 1992 |
| IL | Israel | 1 June 1996 |
| IN | India2 | 7 December 1998 |
| IQ | Iraq | 30 April 2022 |
| IR | Iran (Islamic Republic of) | 4 October 2013 |
| IS | Iceland | 23 March 1995 |
| IT | Italy | 28 March 1985 |
| JM | Jamaica | 10 February 2022 |
| JO | Jordan | 9 June 2017 |
| JP | Japan | 1 October 1978 |
| KE | Kenya | 8 June 1994 |
| KG | Kyrgyzstan2 | 25 December 1991 |
| KH | Cambodia | 8 December 2016 |
| KM | Comoros | 3 April 2005 |
| KN | Saint Kitts and Nevis | 27 October 2005 |
| KP | Democratic People's Republic of Korea | 8 July 1980 |
| KR | Republic of Korea | 10 August 1984 |
| KW | Kuwait | 9 September 2016 |
| KZ | Kazakhstan2 | 25 December 1991 |
| LA | Lao People's Democratic Republic2 | 14 June 2006 |
| LC | Saint Lucia2 | 30 August 1996 |
| LI | Liechtenstein | 19 March 1980 |
| LK | Sri Lanka | 26 February 1982 |
| LR | Liberia | 27 August 1994 |
| LS | Lesotho | 21 October 1995 |
| LT | Lithuania | 5 July 1994 |
| LU | Luxembourg | 30 April 1978 |
| LV | Latvia | 7 September 1993 |
| LY | Libya | 15 September 2005 |
| MA | Morocco | 8 October 1999 |
| MC | Monaco | 22 June 1979 |
| MD | Republic of Moldova2 | 25 December 1991 |
| ME | Montenegro | 3 June 2006 |
| MG | Madagascar | 24 January 1978 |
| MK | North Macedonia | 10 August 1995 |
| ML | Mali | 19 October 1984 |
| MN | Mongolia | 27 May 1991 |
| MR | Mauritania | 13 April 1983 |
| MT | Malta2 | 1 March 2007 |
| MU | Mauritius | 15 March 2023 |
| MW | Malawi | 24 January 1978 |
| MX | Mexico | 1 January 1995 |
| MY | Malaysia2 | 16 August 2006 |
| MZ | Mozambique2 | 18 May 2000 |
| NA | Namibia | 1 January 2004 |
| NE | Niger | 21 March 1993 |
| NG | Nigeria | 8 May 2005 |
| NI | Nicaragua | 6 March 2003 |
| NL | Netherlands8 | 10 July 1979 |
| NO | Norway5 | 1 January 1980 |
| NZ | New Zealand | 1 December 1992 |
| OM | Oman2 | 26 October 2001 |
| PA | Panama | 7 September 2012 |
| PE | Peru | 6 June 2009 |
| PG | Papua New Guinea | 14 June 2003 |
| PH | Philippines | 17 August 2001 |
| PL | Poland5 | 25 December 1990 |
| PT | Portugal | 24 November 1992 |
| QA | Qatar 2 | 3 August 2011 |
| RO | Romania2 | 23 July 1979 |
| RS | Serbia9 | 1 February 1997 |
| RU | Russian Federation2 | 29 March 197810 |
| RW | Rwanda | 31 August 2011 |
| SA | Saudi Arabia | 3 August 2013 |
| SC | Seychelles | 7 November 2002 |
| SD | Sudan | 16 April 1984 |
| SE | Sweden5 | 17 May 1978 |
| SG | Singapore | 23 February 1995 |
| SI | Slovenia | 1 March 1994 |
| SK | Slovakia | 1 January 1993 |
| SL | Sierra Leone | 17 June 1997 |
| SM | San Marino | 14 December 2004 |
| SN | Senegal | 24 January 1978 |
| ST | Sao Tome and Principe | 3 July 2008 |
| SV | El Salvador | 17 August 2006 |
| SY | Syrian Arab Republic | 26 June 2003 |
| SZ | Eswatini | 20 September 1994 |
| TD | Chad | 24 January 1978 |
| TG | Togo | 24 January 1978 |
| TH | Thailand2 | 24 December 2009 |
| TJ | Tajikistan2 | 25 December 1991 |
| TM | Turkmenistan2 | 25 December 1991 |
| TN | Tunisia2 | 10 December 2001 |
| TR | Türkiye | 1 January 1996 |
| TT | Trinidad and Tobago | 10 March 1994 |
| TZ | United Republic of Tanzania | 14 September 1999 |
| UA | Ukraine2 | 25 December 1991 |
| UG | Uganda | 9 February 1995 |
| US | United States of America11, 12 | 24 January 1978 |
| UY | Uruguay1, 13 | (will become bound on 7 January 2025) |
| UZ | Uzbekistan2 | 25 December 1991 |
| VC | Saint Vincent and the Grenadines2 | 6 August 2002 |
| VN | Viet Nam | 10 March 1993 |
| WS | Samoa2 | 2 January 2020 |
| ZA | South Africa2 | 16 March 1999 |
| ZM | Zambia | 15 November 2001 |
| ZW | Zimbabwe | 11 June 1997 |
- All PCT Contracting States except Uruguay are bound by Chapter II of the PCT relating to the international preliminary examination.
- With the declaration provided for in PCT Article 64(5).
- Applies also to Hong Kong, China with effect from 1 July 1997.
- Not applicable to Macau, China.
- With the declaration provided for in PCT Article 64(2)(a)(ii) .
- Including all Overseas Departments and Territories.
- The United Kingdom extended the application of the PCT to the Isle of Man with effect from 29 October 1983, to the territory of Gibraltar with effect from 1 January 2021 and to the territory of the Bailiwick of Guernsey with effect from 23 March 2021.
- Ratification for the Kingdom in Europe, the Netherlands Antilles and Aruba. The Netherlands Antilles ceased to exist on 10 October 2010. As from that date, the PCT continues to apply to Curaçao and Sint Maarten. The PCT also continues to apply to the islands of Bonaire, Sint Eustatius and Saba which, with effect from 10 October 2010, have become part of the territory of the Kingdom of the Netherlands in Europe.
- Serbia is the continuing State from Serbia and Montenegro as from 3 June 2006.
- Date of ratification of the Soviet Union, continued by the Russian Federation as from 25 December 1991.
- With the declarations provided for in PCT Articles 64(3)(a) and 64(4)(a).
- Extends to all areas for which the United States of America has international responsibility.
- With the declaration provided for in PCT Article 64(1)(a).
Recent Accessions and Ratifications
- Uruguay, October 7, 2024
- Mauritius, December 15, 2022
- Cabo Verde, April 6, 2022
- Iraq, January 31, 2022
- Jamaica, November 10, 2021
- States bound by the Paris Convention but not the PCT