The Paris Institute of Political Studies (French: Institut d'études politiques de Paris, also known as Sciences Po [sjɑ̃s po] or Sciences Po Paris) is a public research university, with the status of grande école and grand établissement, located in Paris, France, with additional campuses in Dijon, Le Havre, Menton, Nancy, Poitiers and Reims. Sciences Po offers courses and conducts research in political science, history, economics, law and sociology.

The institute was established in 1872 by Émile Boutmy as the École libre des sciences politiques, a private and independent institution of higher education, founded in the aftermath of the Franco-Prussian War with the stated objective of renewing the training of the political elites and thereby contributing to ameliorating the nation's fortunes after its defeat of 1870. Boutmy aimed at modernising education for French civil servants, by offering additional teachings in political sciences, a relatively new field of study at the time. Students would follow traditional courses as a primary education, usually the classics or the law at the Sorbonne.

In 1945, the school was nationalised and re-established as a public institution, after criticism of the attitude of its staff during the Second World War and subsequent calls for its closure.

After a reform in 1985, Sciences Po began offering full degrees in the social sciences as primary education for its students. Since the mid-1990s, Sciences Po’'s curriculum has been substantially reformed beyond in social sciences beyond political sciences. As of 2021, 80% of Sciences Po graduates choose careers in the private sector.

The institute is a member of the Association of Professional Schools of International Affairs (APSIA) and CIVICA – The European University of Social Sciences.