Kumiai communities inhabit territories across Baja California and southern California, where a modern political border crosses older cultural connections. Music, song, and oral narration may document relationships with particular places, families, and ceremonies; forms vary among communities. This category gathers records identified as Kumiai without assuming that every recording originated on the same side of the border or represents a shared practice. Performer and locality names, linguistic varieties, and recording circumstances are essential for understanding provenance and potential archival uses. A cross-border cultural designation should not obscure the specific community associated with an individual document.