This research evaluates habitat and forage use by a reintroduced population of endangered banteng ( Bos javanicus d’Alton, 1823) in Khao Khieo-Khao Chomphu Wildlife Sanctuary, Thailand based on fieldwork conducted between November 2007 and September 2009. Thirteen banteng bred in Khao Kheow Open Zoo were accidentally introduced into the Khao Khieo-Khao Chomphu Wildlife Sanctuary in 1988. Forage species were identified by fecal analysis. The results from field study of showed that the population structure ratio among adults, juveniles and calves was 1:0.5:0.3, respectively. A multiple logistic regression habitat suitability model classified banteng as associated with mixed deciduous forest and agricultural areas (cassava and coconut), at low elevation, distant from human settlements. The kernel density estimate of area use for agriculture was 0.32 km 2 , and for mixed deciduous forest the estimate was 10.75 km 2 and 6.2 km 2 in the dry and wet seasons, respectively. When the wet and dry seasons are combined, the total area use for agriculture was 0.35 km 2 and for mixed deciduous forest, it was 11.40 km 2 . Twenty-three forage species were identified using a combination of fecal analysis and direct observation. Fecal specimens contained high levels of moisture and protein. Major risks to the feral banteng population are low genetic diversity, habitat destruction and poaching. These findings are important for possible translocations elsewhere.