El Llano (in English, The Plain) is a Dominican municipality in the Elías Piña Province. It has a total area of 104.49 km².
The municipality had, in 2010, a total population of 8,344: 4,394 men and 3,950 women. The urban population was 42.95% of the total population. In this numbers are included the population of the municipal district Guanito. The population of El Llano without its municipal district was 4,193.
El Llano was elevated to the category of municipality by the law 687 of 2 July 1974. Before that date, it was part of Comendador.
The main economic activity of the municipality is agriculture, and rice is the main crop.