As of January 2008, IUPAC have
51 National Adhering Organizations (NAOs) and
17 Associate National Adhering Organizations (ANAOs).

 

The most recent changes include:
- 1 Jan 2008 - to show Cuba and Uruguay as NAO (instead of ANAO), to add Ethopia as new NAO, show Argentina as ANAO (instead of NAO), and to remove Albania as ANAO
- 1 Sep 2005 - to show Ukraine as NAO (instead of ANAO) and add Jamaica, Jordan, and Belarus as new NAO
- 1 Mar 2004 - to remove Latvia as ANAO
- 12 Sep 2003 - to show Bangladesh as NAO (instead of ANAO) and add Mauritius as new ANAO