The IPNDV brings together nuclear and non-nuclear weapon states. Representatives from the following have attended various activities of the partnership:
- Argentina
- Australia
- Belgium
- Brazil
- Canada
- Chile
- China
- European Union
- Finland
- France
- Germany
- Holy See
- Hungary
- Indonesia
- Italy
- Japan
- Jordan
- Kazakhstan
- Mexico
- The Netherlands
- Nigeria
- Norway
- Philippines
- Poland
- Republic of Korea
- Romania
- Russia
- Sweden
- Switzerland
- Türkiye
- United Arab Emirates
- United Kingdom
- United States of America
