La Unión is a municipality in the Honduran department of Lempira. It is one of the smallest municipalities of the Lempira department; travel to La Unión is a challenge. One way is to go 75 km from Gracias city on the common road for La Iguala and San Rafael, about 3 km before San Rafael is a left turn. An additional 13 km must be travelled. Another way is via Santa Bárbara-El Nispero-San Jerónimo-San Rafael-La Unión; the first 3 locations are in Santa Bárbara department.
Formerly La Unión was a village called "Pueblo Nuevo", in the jurisdiction of "El Conal" (currently San Rafael). The municipality was created on May 3rd 1916. La Unión is located in a plateau-like surface, guarded by dense, green mountains. Despite the apparent elevation from sea level, sub-tropical forests are present and the weather is tropical.