This study evaluated the use of recycled plastic waste as a partial replacement for coarse aggregates in concrete. Various tests were conducted on the plastic aggregates to determine properties. Concrete mixtures with 0%, 5%, 10%, 15%, 20%, and 25% plastic coarse aggregate replacement were made and tested. Compressive strength slightly decreased with higher plastic replacement levels, while split tensile and flexural strengths increased up to 15% replacement before decreasing. The study concluded that up to 25% plastic replacement produced concrete with similar or suitable properties to traditional concrete, providing an option for plastic waste utilization and reuse in construction.