Brian Paul Klaas (born 29 June 1986) is an American political scientist, a contributing writer at The Atlantic,[1] and an associate professor in global politics at University College London.

He co-authored How to Rig an Election (2018) and authored Corruptible: Who Gets Power and How It Changes Us (2021) and Fluke: Chance, Chaos, and Why Everything We Do Matters (2024).