Many people claim that there are only 5 kingdoms or 3, but here's the current standard classification system.There are 3 domains (Bacteria, Archaea & Eukarya). The first 2 have 2 kingdoms, and the third (Eukarya) has 4 kingdoms (i.e. Animalia, Plantae, Protista, Fungi). So in total, there are 6 kingdoms.