As of November 2009, the International Ergonomics Association has 47 federated societies, 2 affiliated societies, 7 sustaining member organizations, 2 individual sustaining members and 3 networks.

IEA Federated Societies

Federated societies are professional societies in ergonomics/human that have been admitted by the Council for having met and continuing to fulfill the eligibility criteria provide by the IEA Rules. They have voting rights and appoint representatives to Council based on the size of their membership.

IEA Affiliated Societies

Affiliated Societies are national or international professional societies that are ineligible for federated member status or have an interest in ergonomics but have their main aim in an associated area.

IEA Networks

IEA Networks are groupings of IEA federated societies, or its affiliates, formed to address specific needs. Council approves the formation of an IEA Network based on a formal proposal stating the purpose, organizational structure and mode of operation, and which is endorsed by participating societies.

IEA Sustaining Members

Sustaining members are organizations or individuals who support the work of IEA through annual financial contributions. There are several categories of sustaining membership.