Poponto Swamp is a swamp in Luzon, Philippines, located at the boundary of Tarlac and Pangasinan provinces.
This 25-square kilometer swamp can be found at the confluence of the Agno and Tarlac rivers.
[1] It is near the town of Bayambang, Pangasinan.
[2] It is also known as the Mangabol Marsh.
This article about a location in Ilocos region is a stub.