The study was conducted to evaluate the influenced of organic fertilizer using vermicast and mudpress on the yield and nutrient quality (protein and fat) of peanut from July 18, 2018 to October 20, 2018 at Cagayan State University, Lal-lo, Cagayan, Philippines. The different treatment used were: T1 -10-40-0 NPK (Recommended Rate of fertilizer based on soil analysis), T2-5-20-0 NPK (50% RR) + 2300kg mudpress/hectare+ 650kg vermicast/hectare, T3 - 7.5-30-0 NPK (75% RR) + 2300kg mudpress/ha.+ 650kg vermicast/ha., T4 - 2300kg mudpress/ hectare + 650kg vermicast/hectare, T5 - 5-20-0 NPK (50% RR) + 2300kg mudpress/ hectare, T6 -75% RR + 2300kg mudpress/hectare, T7- 7.5-30-0 NPK (75% RR) + 650kg vermicast/hectare, T8-5-20-0 NPK (50% RR) + 650kg vermicast/hectare, T9 - 2300kg mudpress/hectare and T10- 650kg vermicast/ hectare. The experiment was laid out in Randomized Complete Block Design. Based from the result of the study, Treatment 1, Treatment 2 and Treatment 3 produced the highest pod yield of 2.69 tons per hectare, and 2.68 tons per hectare with a Return on Investment of 628.64%., 569.30% and 561.69%. The highest protein content of the peanut seeds was obtained in Treatment 2 and Treatment 1 with a mean of 33.11% and 32.97% while the lowest fat content was produced in Treatment 9 (vermicast) with a mean of 25.74%. Therefore, Treatment 1, Treatment 2, and Treatment 3 are recommended for the farmers to improve their yield and nutrient quality of peanut.