Locris (/ˈloʊkrɪs, ˈlɒk-/;[1][2] Modern Greek: Λοκρίδα, romanized: Lokrída; Ancient Greek: Λοκρίς, romanized: Lokrís) was a region of ancient Greece, the homeland of the Locrians, made up of three distinct districts.

This fact, combined with the region's infertility, meant that the Locrians tended to be dominated by their neighbours, and played little part in Greek history.

To the south-west of Phocis was Ozolian Locris, situated on the north coast of the Gulf of Corinth, between Naupactus and Crisa.

To the north east of Phocis was Opuntian Locris, named after its main city, Opus.

Its territory corresponded with that of the current municipalities Amfikleia-Elateia, Lokroi, and Kamena Vourla.