Gypsum is a soft sulfate mineral made up of calcium sulfate dihydrate and has various applications, such as fertilizer, chalk, and plaster. This book includes five chapters that provide further details on this material. Chapter One focuses on some recently reported gypsum composite plasterboards as well as the functions and properties of various other composite plasterboards. Chapter Two deals with the methods of preparation and utilization of gypsum-based lightweight materials. Chapter Three shows the possibilities of multiple strengthening of gypsum products by surface treatment and impregnation with water-acrylic and epoxy compound. Chapter Four deals with the effect of waste plastic fiber inclusion on the mechanical and some durability properties of foamed gypsum. Lastly, Chapter Five captures the current state of art of gypsum utilization in geotechnical applications.