Carbon in cocoa agroforestry systems of the Bribri Indigenous Reserve of talamanca, Costa Rica We determined the carbon stored in cocoa (Theobroma cacao) organic agroforestry systems managed by indigenous families of the Bribri ethnic group in Talamanca, Costa Rica. We measured carbon in all compartments: soil, leaf litter, roots, necromass and aboveground biomass, using methodologies accepted by the IPCC. We also calculated carbon accumulation rates and their monetary value. We analyzed the correlations of site variables (topography and soils) and canopy composition (richness, abundance, basal areas and biomass) with carbon contents and we made cluster analyses with the same variables to investigate which AFS groups with what characteristics store more carbon. The cocoa-AFS of Talamanca recorded a total carbon average of 122 ± 24 t C ha-1, considered an intermediate to high level. Forty-three percent of the carbon was stored in the aboveground biomass and 41% in the soil. The rate of carbon accumulation in the aboveground biomass was 3.0 ± 1.9 t C ha-1 yr-1, with a monetary value of US$54 ha-1 yr-1. Carbon storage capacity is especially correlated with the basal area of timber and fruit trees, as evidenced by the correlation and cluster analyses performed, since the cocoa-AFS groups with larger basal areas were the ones that recorded the most total carbon and aboveground biomass. These data may be useful for local or national governments and producer organizations in their efforts to propose strategies for climate change adaptation/mitigation, access to payments for environmental services, and gain better prices for their agroforestry products.