Prossedi (locally Prussedi) is a comune (municipality) in the province of Latina in the Italian region Lazio, located about 80 kilometres (50 mi) southeast of Rome and about 30 kilometres (19 mi) east of Latina.
The village was founded by refugees from the destruction of Priverno in the 7th century. It was a possession of several baronial families, including the Chigi and the Conti. The most notable feature is the Romanesque church of San Nicola.