Sibunag is a fifth class municipality in the province of Guimaras, Philippines. Its territory includes the islands of Inampulugan, Natugna, and several other minor islets in the Guimaras Stait. According to the 2010 census, it has a population of 19,565 people. The town was created by virtue of Republic Act No. 7896 on February 20, 1995.