Land Area, Location and Boundaries
The municipality of Tumauini is located at 17°16′N 121°48′E and is bounded by the Municipality of Cabagan in the north, the Municipality of Divilacan in the east, the City of Ilagan in the south and the Cagayan River and the Municipality of Delfin Albano in the west. It is subdivided into 46 barangays and has a land area of 467.30 square kilometers and is within the jurisdiction of the 1st Congressional District of the Province.
The municipal center of Tumauini is situated at approximately 17° 16′ North, 121° 49′ East, in the island of Luzon. Elevation at these coordinates is estimated at 39.0 meters or 128.0 feet above mean sea level.
Former Territories of Tumauini
On April 8, 1952, by virtue of Republic Act 678, the barrios of Barucbuc, Siempre Viva, Bimmonton, Pasurgong, Manga and Settlement No. 1 were transferred to the newly created town of Mallig.
On October 10, 1957, by virtue of Republic Act 2009, the barrios of San Antonio, San Juan, Ragan Sur, Ragan Norte, Ragan Almacen, San Jose (Bulo), San Patricio, Quibal, San Andres (Lattu), Calinawan Sur, Bayabo, Santor, Sto. Rosario, Andarayan, Aneg, San Isidro, Mawi, San Roque, Carmencita, Aga, Villa Pareda, Villaluz, San Pedro, Concepcion, Sammabario and San Nicolas and the sitios of Turod, Paco, Calamagui and Kim-malabasa, were separated from the municipality of Tumauini to form the town of Magsaysay which was later renamed to Delfin Albano in 1982.
On June 21, 1969, the territory of Tumauini was further trimmed with the creation of the Municipality of Divilacan by virtue of Republic Act 5776. Divilacan, a sitio of Barrio Antagan was extracted from Tumauini.
Based on the great-circle distance (the shortest distance between two points over the surface of the Earth), the cities closest to Tumauini are Ilagan, Cauayan, Tuguegarao, Tabuk, Santiago, and Candon. The nearest municipalities are Delfin Albano, Santo Tomas, Quirino, Cabagan, San Pablo, and Santa Maria. Its distance from the national capital is 309.94 kilometers (192.59 miles). The following list delineates such distance measurements.
- Delfin Albano, Isabela, 4.72 kilometers (2.93 miles) to the Northwest (N44°W)
- Santo Tomas, Isabela, 14.70 kilometers (9.13 miles) to the North‑Northwest (N18°W)
- Quirino, Isabela, 17.10 kilometers (10.62 miles) to the South‑Southwest (S27°W)
- Cabagan, Isabela, 17.53 kilometers (10.89 miles) to the North‑Northwest (N16°W)
- San Pablo, Isabela, 19.36 kilometers (12.03 miles) to the North (N5°W)
- Santa Maria, Isabela, 22.68 kilometers (14.09 miles) to the North‑Northwest (N16°W)
- Ilagan, Isabela, 16.64 kilometers (10.34 miles) to the South‑Southeast (S30°E)
- Cauayan, Isabela, 37.86 kilometers (23.53 miles) to the South (S7°W)
- Tuguegarao, Cagayan, 38.36 kilometers (23.84 miles) to the North‑Northwest (N12°W)
- Tabuk, Kalinga, 41.84 kilometers (26.00 miles) to the West‑Northwest (N68°W)
- Santiago, Isabela, 70.78 kilometers (43.98 miles) to the South‑Southwest (S23°W)
- Candon, Ilocos Sur, 145.20 kilometers (90.22 miles) to the West (S86°W)
Distance from Manila: 309.94 kilometers (192.59 miles) to the South‑Southwest (S17°W)