Michael Zinn Lewin is an American writer of mystery fiction perhaps best known for his series about Albert Samson, a distinctly low-keyed, non-hardboiled private detective who plies his trade in Indianapolis, Indiana. Lewin himself grew up in Indianapolis, but after graduating from Harvard and living for a few years in New York City, has lived in England for the last 40 years. Much of his fiction continues to be set in Indianapolis, including a secondary series about Leroy Powder, a policeman who frequently appears in the Samson novels, generally in a semi-confrontational manner.

Another series, however, is set in Bath, England, where Lewin now lives. This features the Lunghis who run their detective agency as a family business. So far there are three novels and nine short stories about them.

Lewin has also written a number of stand-alone novels. Some have been set in Indianapolis and others elsewhere. His latest novel, Confessions of a Discontented Deity, is even set partly in Heaven. A satire, it breaks from Lewin's history of genre fiction.

Lewin is the son of Leonard C. Lewin, author of the 1967 bestselling satire The Report from Iron Mountain: On the Possibility and Desirability of Peace.