The Isinay (Isinai, Inmeas) are a small group found principally in the municipality of Bambang (1,225), Nueva Vizcaya, and Dupax Sur (265) in Quirino province. The total population is set at about 6,000 (NSO 1980). The language belongs to the northern Philippine, central Cordilleran group.

       The subsistence technology is principally wet rice cultivation. There is some swidden cultivation in the higher elevations. Subsistence is supplemented by animal husbandry. Since the area is linked with the major transportation arteries that connect southern and northern Luzon, and thus exposed to intensive trade, culture change is highly advanced and much of the traditional culture is gone. The population has merged with mainstream society due to the changes wrought by the national power structure, educational system, market economy, and the great religions. Except for the language, the ethnic character is no longer distinguishable.

       Population movement theories point to the Isinay country as one of the possible staging areas for the migration of people to the Ifugao highlands.

Distribution of Ethnic Groups by Provinces
(Arrangement: Population count)
Total National Population 5,624
Agusan N. 10
Agusan S. 22
Batanes 1
Benguet 80
Bukidnon 93
Bulacan 41
Cagayan 20
Davao 21
Ifugao 21
Ilocos N. 10
Isabela 75
Kalinga-Apayao 10
La Union 10
Laguna 11
Lanao N. 19
Lanao S 11
Misamis Or. 30
N. Ecija 10
N. Vizcaya 5,003
Pangasinan 12
Quezon 10
Rizal 9
Romblon 9
Surigao N. 36
Zambales 9
Zamboanga N. 10
Zamboanga S. 10
Q.C. 10
Valenzuela 11