Prossedi (locally Prussedi) is a comune (municipality) in the province of Latina in the Italian region Lazio, located about 80 km southeast of Rome and about 30 km east of Latina. Prossedi borders the following municipalities: Amaseno, Giuliano di Roma, Maenza, Priverno, Roccasecca dei Volsci, Villa Santo Stefano. 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.