It is bordered by the comarques of Comtat on the northwest, Marina Alta on the northeast, Alacantí and Alcoià on the west and the Mediterranean Sea on the east.

The interior of this comarca is mountainous, and it is dominated by the Serra d'Aitana whose highest peak is 1,500 m. The local fauna is composed by eagles, hawks, crows, blackbirds, swallows, foxes, wildcats, wild boars and many smaller animals.

The terrain is calcareous, so the landscape shows impressive caves and natural archways and fountains.

The comarca of la Marina Baixa comprises 18 municipalities, listed below with their areas and populations:

This article about a location in the Valencian Community, Spain, is a stub.