Pyrgos is the capital of the Elis regional unit in Greece. The city is located in the western part of the Peloponnese, in the middle of a plain, from the Ionian Sea. The river Alfeios flows into sea about south of Pyrgos. The population of the town Pyrgos is 25,180, and of the municipality 47,995 (2011). Pyrgos is west of Olympia, southeast of Amaliada, southwest of Patras and west of Tripoli.