Global warming is one of the issues of the world today. Estimation of carbon stocks through an assessment of the amount of biomass can be performed to determine the carbon sequestration by vegetation. Carbon sequestration by vegetation could be expected to reduce the potential for global warming. Research by Title Estimation of Biomass and Carbon Content on Tree Stands For Climate Change Mitigation Efforts have been implemented in Community Forests of Bunder Gunung Kidul regency from June to September 2015. The research was conducted by measuring the diameter and height of trees in the sample plot size of 100 x 50 meters totaled 6 plots. The calculation of the amount of biomass and carbon stored using allometric equation of the measurement results of diameter and height of trees in the community forest (moor and yards) Village Jatimulyo, Kec.Jatipuro, Kab. Karanganyar, Central Java conducted done by BPKH Region XI Java-Madura. The results of analysis and calculations showed that the carbon stored in vegetation of Bunder forest amounted to 1,031,581.11 g / ha of total biomass 2,242,567.62 g / hectare and has the potential CO2 uptake by 3,782,464.05 g/hectare. The amount of biomass stored is an overview of the productivity of tree stands to absorb CO2 through photosynthesis.