Montalvo Canton is a canton of Ecuador, located in the Los Ríos Province. Its capital is the town of Montalvo. Its population at the 2001 census was 20,067.DemographicsEthnic groups as of the Ecuadorian census of 2010: Mestizo 66.7%Montubio 24.7%Afro-Ecuadorian 4.9%White 2.9%Indigenous 0.5%Other 0.2%