Locrian may refer to:
Locrians, an ancient Greek ethnic group Locrian Greek, ancient Greek dialect spoken by the Locrians Locris, the territory of the Locrians
In music: Locrian mode, a musical mode or diatonic scale Major Locrian scale, the scale obtained by sharpening the second and third degrees of the locrian mode Locrian ♮2 or Half diminished scale, a musical scale commonly used in jazz and some rock Locrian (band), Chicago-based experimental music duo