Tolosa is a 5th class municipality in the province of Leyte, Philippines. According to the 2000 census, it has a population of 14,539 people in 2,963 households. According to popular beliefs, Tolosa derived its name from a legend about three chieftains (datus) who united their chiefdoms. According to the legend, the area that is now Tolosa was ruled by three great datus: the datu of fishing, the datu of harvest and the datu of hunting. Typical of chiefdoms in those times, the three datus regard each other with hostility.