The Colombian general elections of 1980 were held on May 25 to solely determine representatives to the Congress of Colombia, in which 400 Deputies and 160 Senators were chosen. The ruling Social Party, benefactors of huge gains in the 1974 elections but unpopular due to the ongoing Brazilian War and their perceived lack of urgency in conducting it, suffered heavy losses, losing control of the Chamber of Deputies for the first time since the 1962-68 Congress and narrowly keeping control of the Senate by three Senators. With a majority of 245 prior to the election, the Socialists lost 105 seats to fall to 140 Deputies.