There is an urgent need for innovative and sustainable solutions to address the growing challenge of depleting fossil fuel energy and the management of CO2 buildup in the atmosphere globally [1]. The transition away from fossil fuels seems to be inevitable. In this context, thermochemical water splitting has emerged as one of the promising methods for producing green hydrogen [2-5]. In this study, ferrous metal scrap materials are employed to split water at higher temperatures using a packed-bed thermochemical reactor fabricated indigenously. Hydrogen production conditions are optimized by varying the particle size of the ferrous metal wastes in the range of 250 µm to greater than 1000 µm and the temperatures ranging 900 °C to 1200 °C. The maximum yield of hydrogen obtained is ~500 mL per gram of the ferrous scrap sample. This study demonstrates that the discarded ferrous metal wastes can be utilized as feed-materials for thermochemical production of green hydrogen. Medium size metal particles show higher hydrogen production capacity compared to both smaller (