The Municipality of Pyrgos instituted by the Program of Kallikratis the 1th January 2011, resulted from the combination of pre-existing municipalities Pyrgos, Olena, Volakas and Iardano. The extent of the new municipality is 455.12 km ² and the population estimated at 51,777 inhabitants according to the 2001 census. The capital of the municipality is Pyrgos.

Municipal Section of Pyrgos

The city of Pyrgos got its name from the tower that was built, at 1512, at the location of Eparxeio from the Mpei of the wider area who was named Georgios Tsernotas.

Located in the western part of the prefecture, abstains 4km from the sea, 19km from Ancient Olympia and 315km from Athens, the capital of Greece.

Composed of 19 municipal departments, has population of 33,791 inhabitants (according to 2001 census) and an area of ​​170,866 acres. The seaport is Katakolon.

Municipal Section of Olena

Oleni, established in Karatoula, took her name from the village of Olena where was located and the mediaeval town Olena.

Located in the center of prefecture of Ilia, next to Ancient Olympia. Composed of 16 municipal departments, has population of 9,045 inhabitants and an area of ​​152,231 acres.

It is an agricultural area clearly with lowland and foothill areas (62 to 600 meters in altitude).
Known for its oil, raisins and vines. Provides many route choices, while hosting important religious monuments such as the Monastery of Panagia Kremastis, the Monastery of St. Ioanni Prodromou Nikavas, the Monastery of Askiti etc.
The gorge of Goumero, historic Olympic path, Varangas village and Trypio Lithari in Koutsohera are just a few of the rare natural sights.

Municipal Section of Iardanos

Iardanos, established in Vounargo, took its name from the river Iardano.
Composed of 9 municipal departments.

Municipal Section of Volakos

Volakas, established in Epitalio, composed of 4 municipal departments and has population of 3,552 inhabitants.
Epitalio village is located near at the dried lake of Agoulitsa. Ancient Epitalio is located northwest of the homonymous community. The excavation was conducted by P. Themelis brought a Roman bath with hypocaust, workshops, a ceramic kiln, a large public building of unknown use and foundations of many houses. All belong to the Hellenistic and Roman times.