ICE's Associated Societies are crucial to the Institution's "learned society" function, contributing to our knowledge base across a wide range of specialist areas, within the diverse arena of the built and natural environment.

• The British Dam Society (BDS)
• The British Geotechnical Association (BGA)
• The British Hydrological Society (BHS)
• The British Nuclear Energy Society (BNES)
• The British Tunnelling Society (BTS)
• Central Dredging Association (CEDA)
• International Association of Hydraulic Engineering and Research (IAHR)
• The International Commission on Irrigation and Drainage (ICID)
• The Offshore Engineering Society (OES)
• International Navigation Association (PIANC)
• The Railway Civil Engineers' Association (RCEA)
• The Society for Earthquake and Civil Engineering Dynamics (SECED)
• Transport Planning Society (TPS)
• Wind Engineering Society (WES)