Samson Abramsky (born 12 March 1953) is a British computer scientist who is a Professor of Computer Science at University College London. He was previously the Christopher Strachey Professor of Computing at Wolfson College, Oxford, from 2000 to 2021.

Abramsky's early work included contributions to domain theory and the connections thereof with geometric logic. Since then, his work has covered the lazy lambda calculus, strictness analysis, concurrency theory, interaction categories and geometry of interaction, game semantics and quantum computing. Notably, he co-pioneered categorical quantum mechanics. More recently, he has been applying methods from categorical semantics to finite model theory, with applications to descriptive complexity.

Abramsky was educated at Hasmonean Grammar School for Boys, Hendon and at King's College, Cambridge (BA 1975, MA Philosophy 1979, Diploma in Computer Science) and Queen Mary, University of London (PhD Computer Science 1988, supervised by Richard Bornat).

Since 2021, Abramsky has been Professor of Computer Science at University College London. He has been a Fellow of the Royal Society since 2004. His research includes the development of game semantics, domain theory in logical form, and categorical quantum mechanics.

His earlier positions include:

Abramsky has played a leading role in the development of game semantics, and its applications to the semantics of programming languages. Other notable contributions include his work on domain theory in logical form, the lazy lambda calculus, strictness analysis, concurrency theory, interaction categories, and geometry of interaction. He has recently been working on high-level methods for quantum computation and information.

Samson Abramsky co-edited 6 Volumes Handbook of Logic in Computer Science with Dov Gabbay and Tom Maibaum:

Abramsky has published over two hundred publications and his h-index was 57 as of October 2019.