Oil spill can contaminate the environment as a consequence of activities related to crude oil exploration, oil refinary, transporation, pipeline leaking, and industrial processes. This researchrelated with the characteristics of coir dust as oil sorbent material to remove oil from water. Hydrophobicity is an important parameter that determines the effectiveness of the oil sorbent. Some treatment were done in this research to increase the hydrophobicity of choir dust. Moreover, these treatments were expected to improve oil sorption capacity of coir dust. They are heating andacetylation prosess. The results showed both of heating and acetylation could increase hydrophobicity and oil sorption capacity onto coir dust.