La Unión is a city located in the Los Ríos region of Ecuador. It is situated in the western part of the country in an area characterized by coastal lowlands and river systems that define much of the geography of Los Ríos Province.
As a settlement in Los Ríos, La Unión is part of a region historically significant for agriculture and commerce, particularly related to the Guayas River basin and its tributaries. The province has been an important economic zone in Ecuador's coastal region.