Freakonomics: A Rogue Economist Explores the Hidden Side of Everything is a hit book by author Stephen J. Dubner and University of Chicago economist Steven Levitt.

Freakonomics is a compilation of essays that Steven Levitt had written. The essays had been adapted into a less technical format so that readers without a strong background in economics would be able to understand them. In his pieces, Levitt applies economic theory to social or historical issues that are usually not analyzed by economists. Examples of this include the effect of legalized abortion on crime levels and corruption in the sport of sumo wrestling.

Some of the book is based on the work of sociologist Sudhir Venkatesh.

Freakonomics has sold over 3 million copies and has garnered attention for introducing economics to people with little background education in the field. The book has also drawn criticism from free market economists, who claim the ideas presented in the book are invalid. John R. Lott wrote Freedomnomics in response, debating some of the core arguments Levitt makes in Freakonomics.