Access to potable water remains a significantglobal challenge due to the elevated levels of pollutants present in water bodies. As a result, there is an increasing demand for freshwater resources and/or a critical necessity to utilize treated effluents as a new and innovative source of water supply. It is estimated that about 3% of the world's electricity generation is used in the treatment and supply of water. Therefore, reducing energy costs in water and wastewater treatment plants (WWTPs) is critical. To achieve these objectives, innovative concepts must be developed to cope with the drawbacks of conventional treatment technologies. A hybrid system (HS) is an integration of two or more treatment methods employed synergistically for effective pollutant removal. Nowadays, hybrid wastewater treatment systems are gaining attention due to their potential to reduce the cost, footprint, process time, chemical and energy usage, and production of secondary pollutants. They can effectively enhance the overall treatment efficacy and sustain energy as a renewable resource. This study provides an up-to-date overview of different HSs involving biological, physical, and chemical processes for wastewater treatment. A brief background on hybrid wastewater treatment technologies with different case studies is given. In addition, the research gaps are addressed with conclusions and recommendations. Consequently, integrating hybrid models presents significant promise for advancing wastewater treatment technologies and achieving the dual goals of contaminant removal and energy production. They can start perceptively to displace the conventional technologies which already consume around 30% of the cost in wastewater treatment, without any hindrance. Hybrid wastewater treatment systems can overcome the limitations of conventional systems. They can minimize the cost of energy, minimize the wastewater treatment cost, and increase the quality of the effluents, to comply with strict discharge regulations and establish a renewable source of fresh water.