Inverse Problems International Association (IPIA) :
http://www.ipia.site
Finnish Inverse Problems Society (FIPS):
https://www.fips.fi
The German Speaking Inverse Problems Society (GIP):
https://inverseprobleme.de/?page_id=75&lang=en
The Eurasian Association on Inverse Problems (EAIP):
https://www.eurasianip.org