The estimated above ground C stock of Caimpugan peatland in Agusan Marsh was 22.8 million tons of C with in its 5,487 hectare peatland. The estimated mean belowground C stock (4,659.06 tC/ha) was much higher than mean aboveground C stock (52.53 tC/ha). Caimpugan peat soils are classified as Typic troposaprists and C emissions occurred during its formation. Anthropogenic disturbances were more dominant than the natural factors that treatment the sustainability of ecosystem service on C sequestration. This ecosystem service was least recognized by the stakeholders of peatland. Environmental science based management options were recommended for environmental sustainability of this peatland.