Due to its enormous significance for human life, at the present time water treatment is the subject of greatest importance. Technological progress, which is an integral part of the modern world is also the cause of a number of environmental problems. One such problem is water pollution by organic dyes which are mainly a consequence of the development of the textile industry. The importance of this problem led to the development of many different methods and techniques. Due to a number of advantages (stability, low cost, efficiency, etc.), the use of compounds based on silica is a matter of great interest to scientists at the present time. This review discusses the applications of functionalized silica-based inorganic/organic copolymers in removal of the most common organic dyes for water and wastewater purification process.