An integrated system, harnessing solar and geothermal resources, is presented and evaluated. This review aims to produce H2, from solar-geothermal resources. This integrated renewable energy system comprises solar PV/T modules as well as geothermal energy for H2 synthesis. A review was carried out to examine the impact of different system design parameters on the energy and exergy efficiencies of both the overall system and its subsystems. Geothermal-solar hybrid systems for H2 production integrate geothermal energy and solar power to create a sustainable and efficient method for hydrogen generation. These systems capitalize on the continuous and stable heat supply from geothermal sources combined with the intermittent yet potent energy from solar radiation. By leveraging the strengths of both energy sources, the hybrid system can achieve higher efficiency and reliability in hydrogen production. Geothermal energy provides a consistent base load, reducing the dependency on solar energy's variability, while solar power can be used during peak sunlight hours to boost production. This synergy not only enhances the overall energy output but also reduces GHG emissions, making it an environmentally friendly solution for meeting the growing demand for clean H2.