This study aims to determine the distribution area of ​​seagrass using sentinel 2 imagery. The research was carried out for two months from March to April 2023. Data processing techniques to see the distribution and extent of seagrass used the lyzenga method to improve image quality and image composites used, namely 432, in conducting data validation using the random sampling method, namely sampling in several random ground check points. From the results of the discussion, it can be concluded that the distribution of seagrass on Bontosua Island spreads to the north, west and south of Bontosua Island with an area of ​​4.26 Ha. The results of the distribution of seagrass which have been interpreted by imagery and the results of the ground check, it can be seen that the accuracy value of sentinel imagery in making maps the distribution of seagrass on Bontosua Island is 72%. This shows that the level of classification results for shallow seabed objects, namely seagrass class, is correct, namely 72%, the resulting accuracy test value can be influenced by several factors including image resolution. The higher the image resolution, the better the classification accuracy value.