The British Geotechnical Association is a learned 'Associated Society' of the Institution of Civil Engineers, based in London, England, and a registered UK charity (No. 284131). It provides a focal point for organisations and individuals interested in geotechnical engineering.

Activities include annual lectures (notably the Rankine Lecture named after William Rankine, an early contributor to the theory of soil mechanics, and the Géotechnique Lecture), monthly meetings, an annual conference, and a magazine: Ground Engineering.