The Polity data series is a data series in political science research. Along with the V-Dem Democracy Indices project and The Economist Democracy Index, Polity is among prominent datasets that measure democracy and autocracy.
The Polity study was initiated in the late 1960s by Ted Robert Gurr and is now continued by Monty G. Marshall, one of Gurr's students. It was sponsored by the Political Instability Task Force (PITF) until February 2020. The PITF is funded by the Central Intelligence Agency.