Muisne is a coastal town in the southwest of the province of Esmeraldas in northwestern Ecuador, with a population of 5,574 in the last Ecuadoriā¦Muisne is a coastal town in the southwest of the province of Esmeraldas in northwestern Ecuador, with a population of 5,574 in the last Ecuadorian census in 2022. It is the seat of the namesake canton.