聖馬科斯省
In 1893, La Reforma was still a village of San Cristóbal Cucho, and in the 1921 census is shown with 6.125 inhabitants, 3.144 male and 2.981 female. The population realized that it was time to set their own municipality to address their basic need and finally were able to create in 1988. The named it "La Reforma" after general Justo Rufino Barrios, the Reformer, who was born in San Marcos Department.