The increasing accumulation of electronic waste (e-waste) has raised significant environmental concerns, prompting the need for effective recycling solutions. This study investigates the potential use of crushed e-waste glass as a partial replacement for traditional fine aggregates in mortar and concrete, assessing its effects on the mechanical properties of these materials. Crushed e-waste glass was incorporated in varying percentages (5%, 10%, 15%, and 20%) into both mortar and concrete mixes, and the resulting materials were evaluated for their compressive strength, flexural strength, workability, and durability characteristics. The study found that the inclusion of crushed e-waste glass influenced the mechanical properties differently for mortar and concrete. In mortar, a significant improvement in strength was observed at 5% replacement, but further increases in e-waste content led to a decrease in strength due to the lower bonding potential of glass particles. In concrete, the optimal performance was noted at 10% replacement, where the compressive and flexural strengths were enhanced, and the workability of the mix was satisfactory. The study highlights the feasibility of utilizing crushed e-waste glass as a sustainable alternative in construction materials, suggesting it as an effective method to mitigate environmental impacts while enhancing the performance of concrete and mortar in specific applications. However, the long-term durability and environmental implications of such materials warrant further investigation.