The National Opposition Union (Spanish: Unión Nacional Opositora, abbreviated as UNO) was a Salvadoran political coalition which existed from 1972 to 1979.
The coalition was composed of the Christian Democratic Party, the National Revolutionary Movement, and the Nationalist Democratic Union.
The coalition was formed to oppose the National Conciliation Party, the military controlled political party which controlled El Salvador.
UNO ran in the presidential elections of 1972 and 1977.
This article about a political party in El Salvador is a stub.