| Contracting Party | Treaty | Signature | Instrument | In Force | Details |
|---|
| European Union (EU) | Beijing Treaty on Audiovisual Performances | June 19, 2013 | | | |
| Cook Islands | Berne Convention | | Accession: May 3, 2017 | August 3, 2017 | Details |
| Portugal | Berne Convention | | Accession: March 29, 1911 | March 29, 1911 | Details |
| Portugal | Brussels Convention | | Accession: December 11, 1995 | March 11, 1996 | |
| Portugal | Budapest Treaty | | Accession: July 16, 1997 | October 16, 1997 | |
| African Intellectual Property Organization (OAPI) | Hague Agreement | | Accession: June 16, 2008 | September 16, 2008 | Details |
| European Union (EU) | Hague Agreement | | Accession: September 24, 2007 | January 1, 2008 | Details |
| Portugal | Hague Agreement | November 6, 1925 | | | Details |
| Portugal | Lisbon Agreement | October 31, 1958 | Ratification: June 9, 1966 | September 25, 1966 | Details |
| Portugal | Locarno Agreement | October 8, 1968 | | | |
| Portugal | Madrid Agreement (Indications of Source) | April 14, 1891 | Ratification: October 31, 1893 | October 31, 1893 | Details |
| Portugal | Madrid Agreement (Marks) | April 14, 1891 | Ratification: October 31, 1893 | October 31, 1893 | Details |
| African Intellectual Property Organization (OAPI) | Madrid Protocol | | Accession: December 5, 2014 | March 5, 2015 | Details |
| European Union (EU) | Madrid Protocol | | Accession: July 1, 2004 | October 1, 2004 | Details |
| Portugal | Madrid Protocol | June 28, 1989 | Ratification: December 20, 1996 | March 20, 1997 | |
| European Union (EU) | Marrakesh VIP Treaty | April 30, 2014 | | | |
| Portugal | Nairobi Treaty | October 24, 1981 | | | |
| Portugal | Nice Agreement | June 15, 1957 | Ratification: April 28, 1959 | April 8, 1961 | Details |
| Portugal | Paris Convention | March 20, 1883 | Ratification: June 6, 1884 | July 7, 1884 | Details |
| Portugal | Patent Cooperation Treaty | | Accession: August 24, 1992 | November 24, 1992 | |
| European Patent Organisation (EPO) | Patent Law Treaty | May 17, 2001 | | | |
| Portugal | Patent Law Treaty | June 2, 2000 | | | |
| Portugal | Rome Convention | | Accession: April 17, 2002 | July 17, 2002 | |
| African Intellectual Property Organization (OAPI) | Singapore Treaty | | Accession: November 13, 2015 | February 13, 2016 | Details |
| Benelux Organization for Intellectual Property (BOIP) | Singapore Treaty | | Accession: October 8, 2013 | January 8, 2014 | |
| Portugal | Singapore Treaty | March 28, 2006 | | | |
| Portugal | Strasbourg Agreement | | Accession: April 28, 1978 | May 1, 1979 | |
| European Union (EU) | Trademark Law Treaty | June 30, 1995 | | | Details |
| Portugal | Trademark Law Treaty | October 28, 1994 | | | |
| African Intellectual Property Organization (OAPI) | UPOV Convention | | Accession: June 10, 2014 | July 10, 2014 | Details |
| European Union (EU) | UPOV Convention | | Accession: June 29, 2005 | July 29, 2005 | Details |
| Portugal | UPOV Convention | | Accession: September 14, 1995 | October 14, 1995 | Details |
| Portugal | Vienna Agreement | June 12, 1973 | | | |
| Cook Islands | WIPO Convention | | Accession: July 27, 2016 | October 27, 2016 | |
| Portugal | WIPO Convention | July 14, 1967 | Ratification: January 27, 1975 | April 27, 1975 | Details |
| European Union (EU) | WIPO Copyright Treaty | December 20, 1996 | Ratification: December 14, 2009 | March 14, 2010 | Details |
| Portugal | WIPO Copyright Treaty | December 31, 1997 | Ratification: December 14, 2009 | March 14, 2010 | |
| European Union (EU) | WIPO Performances and Phonograms Treaty | December 20, 1996 | Ratification: December 14, 2009 | March 14, 2010 | Details |
| Portugal | WIPO Performances and Phonograms Treaty | December 31, 1997 | Ratification: December 14, 2009 | March 14, 2010 | |
