Biochemical constituents of fresh and processed (dried) forms of Oryctes owariensis larvae were investigated in the laboratory using standard procedures stipulated by the Association of Official Analytical Chemists (AOAC). The values for the nutrient composition were higher for the fresh sample except for carbohydrates which was higher in the dried sample. Mean percentage values for moisture content was 9.34% and 3.74%; ash content: 4.73% and 2.44%; Crude protein: 41.75% and 36.86%; crude fat: 15.57% and 12.46%; crude fibre: 2.80% and 1.75%; carbohydrate: 35.15% and 46.52% respectively for fresh and dried O. owariensis larvae. Mineral salts and their compositions in the larvae were: calcium (48.57mg/100g and 46.39mg/100g); magnesium (270.91 mg/100g and 266.47mg/100g); sodium (97.57mg/100g and 88.68mg/100g); potassium (84.37mg/100g and 72.78mg/100g); iron (18.68mg/100g and 15.85mg/100g); manganese (5.92mg/100g and 6.67mg/100g); zinc (6.95mg/100g and 4.87mg/100g), phosphorus (93.86mg/100g and 76.94mg/100g) and copper (0.85mg/100g and 0.76mg/100g) in both the fresh and dried larval samples. The mineral content of the fresh form of the larvae were more than those of the dried larvae. The phytochemical analysis of the samples revealed the presence of alkaloids (2.35mg/100g), flavonoids (2.51mg/100g), saponin (1.49mg/100g), phenols (3.65mg/100g), oxalate (1.28mg/100g) and tannins (5.39mg/100g) respectively in the dried larval sample. The nutritional properties and the mineral composition of the larva calls for its complete utilization whether in fresh, dried or processed forms as food supplement for both livestock and humans.