Stoupa Messinia is a settlement that belongs to the Municipality of West Mani. The Municipality of West Mani is a Municipality of the Regional Unit of Messinia, in the Peloponnese Region, which operates from 01-01-2011. It was established in 2010 with the “Kallikratis” Program, from the merger of the pre-existing Municipalities, Municipality of Avia and Municipality of Lefktro, which were established in 1997 with the “Kapodistrias” Plan. Then they were transformed into Municipal Units, the Municipal Unit of Avia, based in Kampos Avias and the Municipal Unit of Lefktro, based in Kardamili.