WFUMB is a Federation of Affiliated Organizations consisting of Regional Federations.

WFUMB's Affiliate Members:

Asian Federation for Ultrasound in Medicine and Biology (AFSUMB)
American Institute of Ultrasound in Medicine (AIUM)
Australasian Society for Ultrasound in Medicine (ASUM)
European Federation for Ultrasound in Medicine and Biology (EFSUMB)
Federation of Latin American Ultrasound Societies (FLAUS)
Mediterranean and African Society of Ultrasound (MASU).

Presently, the total number of individual members is almost 50,000, and these are physicians, scientists, engineers, and ultrasonographers.