Barangay Calayugan Sur

Barangay Calayugan Sur forms part of Loon, a municipality in Bohol, and is classified as a small barangay.

According to the 2020 Census of Population and Housing conducted by the Philippine Statistics Authority, Barangay Calayugan Sur had a population of 677. This made it the 29th largest of 67 barangays in Loon by population, placing it in the middle tier of the municipality. Residents of Barangay Calayugan Sur accounted for approximately 1.53% of the total population of Loon, which stood at 44,224 in the same census year.

Between the 2015 and 2020 censuses, the population of Barangay Calayugan Sur changed from 503 to 677, a shift of +34.6% over the five-year period. This places the barangay among those with growing populations in Loon. The Philippine Statistics Authority classifies Barangay Calayugan Sur as rural, a designation applied to barangays with lower population density and predominantly non-built-up land use.

Loon is a municipality comprising 67 barangays, and serves as the governing unit directly responsible for local services in Barangay Calayugan Sur, including public health, sanitation, peace and order, and civil registration. Within the wider province of Bohol, which contains 1,109 barangays across its component cities and municipalities, Barangay Calayugan Sur ranks 780th by 2020 population. Bohol is classified as a 1st by the Bureau of Local Government Finance, a category that reflects the province's annual regular income.

The barangay's legislative and executive affairs are handled by a Punong Barangay and the Sangguniang Barangay, elected nationwide during the Barangay and SK Elections. The next BSKE is scheduled for Monday, November 2, 2026, following the synchronized election schedule set by COMELEC Resolution No. 11191.