The Bolivian Democratic Union (Spanish

Spanish language

Spanish , also known as Castilian , is a Romance language in the Ibero-Romance group that evolved from several languages and dialects in central-northern Iberia around the 9th century and gradually spread with the expansion of the Kingdom of Castile into central and southern Iberia during the...

: Unión Democrática Boliviana, UDB) was a right-wing political party

Political party

A political party is a political organization that typically seeks to influence government policy, usually by nominating their own candidates and trying to seat them in political office. Parties participate in electoral campaigns, educational outreach or protest actions...

 in Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

.

The Bolivian Democratic Union was founded by Carlos Valdez Molina and Nidio Calavi Castellanos in 1978.
In 1979 the Bolivian Democratic Union allied with the Bolivian Union Party

Bolivian Union Party

The Bolivian Union Party was a political party in Bolivia. The party positioned itself as a 'revolutionary democratic centre-left nationalist' party. It was founded as a continuation of the Sucrist National Union Party . The party contested the 1979 presidential election, with Walter Gonzáles...

 and its candidate Walter González Valda.
After the coup d'état on 17 July 1980 the Bolivian Democratic Union disappeared.