Locrian

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