Upi is a barangay of the philippine municipality Gamu in the province Isabela
in Cagayan Valley
which is part of the Luzon group
Upi belongs to the barangays of Municipality Gamu which are in the outlying area.
The municipality Gamu with a population of about 27,479 and its 16 barangays belong to the partly urban areas in the Philippines. While some of the barangays developed modern urban structures, some others, especially those which are seated in the outlying areas, remained rural. By the end of 2007 Upi had 5,512 residents.
Other barangays of Gamu are:
Barcolan, Buenavista, Dammao, District I (Pob.), District II (Pob.), District III (Pob.), Furao, Guibang, Lenzon, Linglingay, Mabini, Pintor, Rizal, Songsong, Union