Ecuadorian Sign Language (Spanish: Lengua de señas ecuatoriana or de Ecuador, LSEC) is the sign language of Ecuador.

Clark notes that Peruvian, Bolivian, Ecuadorian and Colombian sign languages "have significant lexical similarities to each other" and "contain a certain degree of lexical influence from ASL" as well, at least going by the forms in national dictionaries. Chilean and Argentinian share these traits, though to a lesser extent.