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CPTPP countries

The CPTPP has 12 members: the 11 that signed in 2018 and the United Kingdom, which joined on 15 December 2024.

How many12 countries
As of28 September 2026
SourceGlobal Affairs Canada
Memory hook

Around the Pacific: four in the Americas (Canada, Mexico, Peru, Chile), five in Asia (Japan, Vietnam, Malaysia, Singapore, Brunei), two in Oceania (Australia, New Zealand), plus the UK.

The full list

Original 11 signatories (2018) 11

Signed the CPTPP at its creation in Santiago, March 2018, replacing the collapsed TPP.

First accession 1

The only country to have acceded since the original 11; first non-founding member.

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Not on the list

Questions

How many countries are in the CPTPP?

The CPTPP has 12 members: the 11 that signed in 2018 and the United Kingdom, which joined on 15 December 2024.

Which countries are on the list?

Australia, Brunei, Canada, Chile, Japan, Malaysia, Mexico, New Zealand, Peru, Singapore, Vietnam and United Kingdom.

What is an easy way to remember them?

Around the Pacific: four in the Americas (Canada, Mexico, Peru, Chile), five in Asia (Japan, Vietnam, Malaysia, Singapore, Brunei), two in Oceania (Australia, New Zealand), plus the UK.

Is Costa Rica in the CPTPP?

Not yet. Its accession talks concluded on 6 May 2026, but it had not signed or ratified an accession protocol by late September 2026.

More lists

ASEAN countriesMercosur countriesECOWAS countriesRCEP countriesUK trade deals since BrexitUSMCA countriesAll lists

Each name checked against at least two sources, one of them Global Affairs Canada, on 28 September 2026. Next review by 28 March 2027.
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