The elections consisted of three separate elections in the 305 Portuguese municipalities that existed at the time, the election for the Municipal Chambers, whose winner is automatically elected mayor, similar to first-past-the-post (FPTP), another election for the Municipal Assembly and a last one for the lower-level Parish Assembly, whose winner is elected parish president, this last was held separately in the more than 4,000 parishes around the country. This election was the first to grant a 4-years term, instead of the former 3 years. The number of members of the Municipal Assemblies and Parish Assemblies was greatly reduced in comparison with the former election.
The Democratic and Social Center, this time participating alone in every election, after the end of the Democratic Alliance, continued its electoral decline, gathering only 10 percent of the votes. Despite keeping the same number of mayors achieved in 1982, in the municipalities where it ran alone, 27, the party lost 49 presidencies achieved in coalition with the Social Democrats.
The Portuguese Communist Party and the Portuguese Democratic Movement, united in the United People Alliance, lost one percentage point in comparison with the election of 1982 and lost 8 mayors, gathering only 47 presidencies. However, despite only a small drop in share of the vote, in the elections to Municipal Assemblies, the coalition lost almost 700 assembly members, decreasing its representation to 1062 members due to the overall reduction of mandates.
The newly founded Democratic Renewal Party, achieved almost 5 percent of the voting and the presidency of 3 municipalities. In the elections to Municipal Assemblies it gathered almost 6% of the voting and 270 Assembly members, being the great surprise of the election.
Turnout in these elections fell more than eight points compared with 1982, with 63 percent of voters casting a ballot. It was also the last local election under a 3-year term.
Parties
The main political forces involved in the election were:
The following table lists party control in all district capitals, highlighted in bold, as well as in municipalities above 100,000 inhabitants. Population estimates from the 1981 Census.[3]
The number of candidacies expresses the number of municipalities or parishes in which the party or coalition presented lists.
The number of mandates expresses the number of municipal deputies in the Municipal Assembly election and the number of parish deputies in the Parish Assembly election.
The turnout varies because one may choose not to vote for all the organs.