Sciences Po (French: [sjɑ̃s po]) or Sciences Po Paris, also known as the Paris Institute of Political Studies (French: Institut d'études politiques de Paris), is a public research university located in Paris, France, that holds the status of grande école and the legal status of grand établissement. The university's undergraduate program is taught on the Paris campus as well as on the decentralized campuses in Dijon, Le Havre, Menton, Nancy, Poitiers and Reims, each with their own academic program focused on a geopolitical part of the world. While Sciences Po historically specialized in political science, it progressively expanded to other social sciences such as economics, law and sociology.

The school was established in 1872 by Émile Boutmy as the École libre des sciences politiques in the aftermath of the Franco-Prussian War as a private institution to form a new French elite that would be knowledgeable in political science, law and history. It was a pioneer in the emergence and development of political science as an academic field in France. Following World War II, the school was nationalized and re-established as a public institution. As of 2021, 80% of Sciences Po graduates are employed in the private sector.

Sciences Po Paris is the only Institute of Political Sciences in France allowed to refer to itself with the epithet "Sciences Po" without indicating the name of the city where their headquarters are located, under a legal agreement with the other institutes. They are allowed to use the term "Sciences Po" to refer to themselves only when followed by the names of the cities where they are located, such as "Sciences Po Lille" or "Sciences Po Grenoble".

The institute is a member of the Association of Professional Schools of International Affairs and The European University of Social Sciences.