The Municipality of Megalopolis belongs to the Prefecture of Arcadia in the Peloponnese and in its present form exists after the consolidation of the former municipalities of Arkadia, Gortynos, Megalopolis and Falaias, according to the Kallikratis program.
The municipality has an area of ​​727.33km2 and a population of 13.980 inhabitants, based on the latest census of 2011.
The seat of Megalopolis is Megalopolis.
Megalopolis is an important center after Tripoli. Her story begins in 371 BC when General Epaminondas founded the Great Polis to ward off the Spartans to dominate the area. Over the years, Megalopolis has developed economically and culturally.
A few kilometers outside Megalopolis is the temple of Aghia Theodora Vasta. These are the most characteristic churches in the country where there is the phenomenon of the emergence of 17 trees from the walls of the church. The temple was erected in the 12th century in honor of Saint Theodora. According to tradition, St. Theodora, shortly before she testified, wished her hair to become trees and her blood stream to water them. The temple has been designated a listed monument of nature and has been recorded in the Guinness Book as .