Echague, officially the Municipality of Echague, is a municipality in the province of Isabela, Philippines. According to the 2020 census, it ha…Echague, officially the Municipality of Echague, is a municipality in the province of Isabela, Philippines. According to the 2020 census, it has a population of 88,410 people. The town is known for the indigenous and endangered Yogad language, which is spoken and conserved by its locals.