Kantner may refer to:
- China Kantner (born 1971), American actress and former MTV VJ
- Harold D. Kantner (1886–1973), pioneer aviator
- Konrad V Kantner (1385–1439), Duke of Oleśnica and, after 1427, sole ruler over Oleśnica
- Paul Kantner (born 1941), American rock musician, most noted for co-founding the psychedelic rock band Jefferson Airplane
- Seth Kantner, writer who has attended the University of Alaska and studied journalism at the University of Montana
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