In 1978, there were elections for senator, federal deputy and state deputy, according to data from Brazil's Superior Electoral Court (TSE). For the Senate, 23 senators were elected; ARENA elected the most senators in this election (15), followed by MDB (8). For federal deputy, 420 were elected; the largest caucus was that of ARENA (231), and the most votes in the country went to Waldemiro Teixeira (MDB-RJ). For state deputy, 846 were elected; the largest caucus was that of ARENA (492).

G é Eleição Geral: presidente, governador, senador e deputados. L é Eleição Local (municipal): prefeito e vereador. De 1933 a 1990 o TSE não publica cargo municipal, então esses anos são todos G.