Implementation of tree-based land management strategies, such as agroforestry, can provide greater benefits for mitigating climate change through increased carbon sequestration in soils and plant biomass. However, the carbon sequestration benefits of temperate agroforestry practices at the system-level have not been well-documented. This chapter evaluates the potential for carbon sequestration in temperate agroforestry systems by analyzing existing data from different agroforestry practices in temperate regions worldwide. The authors analyze carbon sequestration rates for aboveground standing biomass, belowground biomass in roots and soil and contribution to long-term SOC stabilization. Based on their analysis of available data, they project that agroforestry practices could annually offset 20%, 18%, 12%, and 8% of total CO2 emissions in the UK, Europe, Canada, and the USA, respectively. Due to the lack of sufficient information to accurately estimate reliable data, they emphasize these projections should be regarded as such.