Synthetically useful reactions of organozirconium compounds are reviewed with emphasis on those developed over the past several years. 1. Introduction 2. Classification and Preparation of Organozirconium Compounds 3. Polar Reactions of Organozirconium Compounds 4. Controlled Monocarbometallation of Alkynes and Alkenes 5. Three- and Five-Membered Zirconacycles 6. Migratory Insertion Reactions of Organozirconium Compounds 7. Catalytic Reactions of Organozirconium Compounds 8. Other Reactions of Organozirconium Compounds