The region of Achaea is located in the northern part of the Peloponnese. It has an area of 3271 square kilometers and about 400,000 inhabitants.

It borders to the east with the region of Corinthia, to the south with the region of Arcadia and the southwest with Ilia. Achaea has many beautiful beaches, since it is surrounded by sea. In the north there is the gulf of Patras and the Corinthian Gulf and in the west the Ionian Sea.

The capital is Patras, the third largest city of Greece, which is also the country's main ferry gateway to western Europe thanks to its port. Among the other towns and villages of the area, the ones that that stand out are Aigio, Rio, Diakopto and Kalavryta, one of the most popular winter destinations in Greece.

The region of Achaea is in most part mountainous. From its mountains three stand out: Helmos, Erymanthos and Panachaiko. The region also has many rivers like Vouraikos and Selinountas, while it is the head of Erymanthos and Ladon rivers which lead to the Alpheus, the largest river in the Peloponnese. Several lagoons and the lake Lamia (Lamia)can be found in the northwest of the region, while near Kalavryta is the Lake Tsivlou that has been created by a natural landslide of Krathis riverbed in 1913.

The climate of Achaea is characterized as temperate mediterranean, yet it varies depending on altitude and as you move from coast to inland.