The New York University Leonard N. Stern School of Business (commonly referred to as NYU Stern, The Stern School of Business, or simply Stern) is the business school of New York University, a private research university based in New York City. Founded in 1900, Stern is one of the oldest business schools in the world. It is located on Gould Plaza next to the Courant Institute of Mathematical Sciences and the economics department of the College of Arts and Sciences.

Stern is a founding member of the Association to Advance Collegiate Schools of Business. Established as the School of Commerce, Accounts and Finance, the school changed its name in 1988 in honor of Leonard N. Stern, an alumnus and benefactor of the school. The school offers Bachelor of Science in Business at the undergraduate level and Master of Business Administration degrees at the postgraduate level. In 2018, Stern ranked 1st among US schools for careers in finance on Wall Street, accounting for 3.9% of hires among major investment banks. Stern is ranked 1st in the world for finance based on the number of research papers by the 2019 Academic Ranking of World Universities (ARWU) ratings.

Stern's alumni include former Chair of the Federal Reserve of the United States, Alan Greenspan; former CEO and current Chairman of Nasdaq, Robert Greifeld; Iceland's "first billionaire", Thor Bjorgolfsson; former CEO and Chairman of MetLife, John J. Creedon; former CEO of Viacom, Thomas E. Dooley; CFO of Pfizer, Alan Levin; President of DC Comics, Paul Levitz; and the founding financier of The Home Depot, Kenneth Langone. Current and former CEOs of Fortune 500 companies including American Express, Berggruen Institute, Griffon Corporation, Wynn Resorts, the New York Stock Exchange, Lehman Brothers, Lord Abbett, Barnes & Noble, W. R. Berkley Corporation, McKinsey & Company, Chase Manhattan Bank, and CBS are also Stern alumni.