Joel David Hamkins is an American mathematician and philosopher who is the John Cardinal O'Hara Professor of Logic at the University of Notre Dame.

After earning a Bachelor of Science in mathematics at the California Institute of Technology, Hamkins earned his Ph.D. in mathematics in 1994 at the University of California, Berkeley under the supervision of W. Hugh Woodin, with a dissertation entitled Lifting and Extending Measures by Forcing; Fragile Measurability.

[3] In January 2022 he moved to the University of Notre Dame[4] as the John Cardinal O'Hara Professor of Logic.

Hamkins research work is cited,[5] and he gives talks,[6] including events for the general public.

This ground-breaking paper gives us a glimpse of the amazingly fecund developments spearheaded by the author and...others..."[21] Hamkins has investigated a model-theoretic account of the philosophy of potentialism.

Hamkins mounted a general account of modal model theory in joint work with his Oxford DPhil student Wojciech Aleksander Wołoszyn.

[28] Hamkins and Davide Leonessi proved that every countable ordinal arises as a game value in infinite draughts.