Oton, officially the Municipality of Oton, is a 1st class municipality in the province of Iloilo, Philippines. According to the 2020 census, it has a population of 98,509 people making it as the most populous town in the province and the entire Panay island.

Guimaras, officially the Province of Guimaras, is an island province in the Philippines located in the Western Visayas region. The capital is Jordan, while the largest local government unit for it is the municipality of Buenavista. The province is situated in Panay Gulf, between the islands of Panay and Negros. To the northwest is the province of Iloilo and to the southeast is Negros Occidental. The whole island is part of the Metro Iloilo–Guimaras, one of the twelve metropolitan areas of the Philippines.