Six Kingdoms

Six Kingdoms may refer to:


 * In biology, a scheme of classifying organisms into six kingdoms:
 * Proposed by Carl Woese et al.: Animalia, Plantae, Fungi, Protista, Archaea/Archaeabacteria, and Bacteria/Eubacteria
 * Proposed by Thomas Cavalier-Smith: Animalia, Plantae, Fungi, Chromista, Protozoa and Eukaryota
 * In Chinese history, six of the Seven Warring States that formed an alliance but were still conquered by Qin: Qi, Chu, Yan, Han, Zhao, and Wei