The purposes of this research were to know the composition of useful plant species and their utilization by the community based on socio cultural of Tenganan Pegringsingan Bali Aga Village. This research was an explorative research. The location of this research was in Bukit Kangin, Tenganan Pengringsingan Village, District of Karangasem. There were two kinds of population in this research; they were the plant vegetation and the community of Tenganan Pegringsingan Village. The plant vegetation was all of the plant species in the forest area of Bukit Kangin. Meanwhile, the social culture population was all of the Tenganan Pegringsingan people. The vegetation samples of this research were all the plant species covered by the 100 squares with size 20×20 m2. Meanwhile, the social culture samples were: The Village Officials (5 pax), The Traditional Village Officials (5 pax), The Community Figures (10 pax), Shamans (2 pax), Offering Artisan (2 pax), and The General Community Members (20 pax). The total sample were 44 persons. The data retrieval of this study was using square method. The square placement was done by using systematic sampling technique [11], [12], [13], [14] [15]. The interview, observation and questionnaires were used to retrieve socio-cultural data [16], [17]. Furthermore, the data were analized descriptively. The results of this research were: 1) There were 77 plants species in Bukit Kangin, Tenganan Pegringsingan Village, Sub-District of Manggis, District of Karangasem. Those 77 species on the data were included into 40 families with total of 2.574 individuals; 2) There were 46 species out of the 77 plant species in Bukit Kangin classified as useful for religious offerings (Hindu), medications, food, housing, clothing and industrial needs. For more detail of their utilization, it can be summarized as follows: for religious offerings (Hindu) there were 29 plants species (35.80%), for medications there were 18 plants species (27.70%), for food there were 17 plants species (20.99%), for housing there were 13 plants species (16.05%), for clothing and industrial needs there were 2 plants species; and 3) Based on the category of the plant organs/parts utilization can be summarized as follow leaves utilization were 23 plants species (32.40%), stem utilization were 18 plants species (25.35%), fruits utilization were 22 species (30.99%), flowers utilization were 4 species (5.64%), roots and seeds utilization were 2 plant species (2.81%). It could be recommended a further more specific and in-depth study on the utilization of those plant species is needed to be done.