IMPACTS currently consists of 13 member cities, listed below. Contact details for the cities concerning their IMPACTS membership can be found in the members area or be obtained via the IMPACTS secretariat.
- Amsterdam
- Barcelona
- Berlin
- Dublin
- Gothenburg
- Hamburg (page in German, alternative: city homepage in English)
- Lviv
- Madrid (page in Spanish)
- Paris (page in French)
- Rome (city homepage, in Italian)
- Tallinn (city homepage, in English)
- Vienna
- Zurich (page in German, alternative: city homepage in English)