This study on the biomass and carbon sequestration of 4 selected economically important bamboo species in the Philippines, namely, giant bamboo (Dendrocalamus asper Schultes f.), kawayan tinik (Bambusa blumeana J.A and J.H. Schultes), bolo (Gigantochloa levis (Blanco) Merr.), and buho (Schizostachyum lumampao (Blanco) Merr.) was conducted by the Ecosystems Research and Development Bureau (ERDB) from 2013 to 2014. Aboveground biomass was determined on 243 sample bamboo culms of the 4 species covering a wide range of diameter classes from 9 provinces in Cordillera Autonomous Region (CAR) and regions 1, 2, 3, 6, 7, 10, 11, and 13. The average dry biomass of the 4 species was 51.1 kg for D. asper, 23.6 kg for B. blumeana, 19.1 kg for G. levis, and 3.8 kg for S. lumampao. Prediction equations using allometric models were developed for estimating the ovendry weights of the whole culm using variables such as diameter and total height. Results on the carbon analysis showed that the aboveground biomass of the 4 bamboo species can store an average of 44.3, 43.6, 43.2, and 39.8 percent carbon for D. asper, B. blumeana, G. levis, and S. lumampao, respectively. Furthermore, carbon content taken from the samples of the 4 bamboo species revealed that the pole (45.4%) showed significantly higher carbon content in its biomass than the branches (43.5%) and the leaves (39.4%).