Rice husk reinforced polyethylene composites and their test specimens were manufactured using a single screw extruder and an injection molding machine respectively. Raw rice husk was chemically treated with benzene diazonium salt in alkali, acidic and neutral media separately. Both raw and treated rice husk were used as filler. Four levels of filler loading (25, 30, 35 and 40 wt%) were used during composite manufacturing. Microstructural analysis and mechanical tests were conducted. Alkali media treated specimens yielded the best set of mechanical properties, while raw rice husk specimens had the worst ones. Based on filler loading, 35% filler reinforced composites had the optimum set of mechanical properties among all composites manufactured.