colspan=2 style="background-color:#E9E9E9" align=left|Parties ! rowspan="2" style="background-color:#E9E9E9" align=right|Votes ! rowspan="2" style="background-color:#E9E9E9" align=right|% ! rowspan="2" style="background-color:#E9E9E9" align=right|± ! colspan="5" style="background-color:#E9E9E9" align="center"|Seats ! rowspan="2" style="background-color:#E9E9E9;text-align:right;" |MPs %/votes % |- style="background-color:#E9E9E9" ! style="background-color:#E9E9E9;text-align=center|1980 ! style="background-color:#E9E9E9;text-align=center|1983 ! style="background-color:#E9E9E9" align=right|± ! style="background-color:#E9E9E9" align=right|% ! style="background-color:#E9E9E9" align=right|± |- | |2,061,309||36.11||8.4||66||101||35||40.40||10.8||1.12 |- | |1,554,804||27.24||||82||75||7||30.00||2.8||1.10 |- | |1,031,609||18.07||1.3||41||44||3||17.60||1.2||0.97 |- | |716,705||12.56||||46||30||16||12.00||6.4||0.96 |- | |39,180||0.69||||||0||||0.00||||0.0 |- | |27,635||0.48||||6||0||6||0.00||2.4||0.0 |- |style="width: 10px" bgcolor=#E2062C align="center" | |align=left|People's Democratic Union |27,260||0.48||0.9||1||0||1||0.00||0.4||0.0 |- |style="width: 10px" bgcolor=#E2062C align="center" | |align=left|People's Democratic Union / PSR |25,222||0.44||||||0||||0.00||||0.0 |- | |20,995||0.37||0.2||0||0||0||0.00||0.0||0.0 |- | |19,657||0.34||1.1||0||0||0||0.00||0.0||0.0 |- | |13,327||0.23||0.8||0||0||0||0.00||0.0||0.0 |- | |11,500||0.20||||||0||||0.00||||0.0 |- | |6,113||0.11||0.0||0||0||0||0.00||0.0||0.0 |- | |5,523||0.10||0.0||0||0||0||0.00||0.0||0.0 |- | |86||0.00||||||0||||0.00||||0.0 |- |colspan=2 align=left style="background-color:#E9E9E9"|Total valid |width="65" align="right" style="background-color:#E9E9E9"|5,561,011 |width="42" align="right" style="background-color:#E9E9E9"|97.43 |width="42" align="right" style="background-color:#E9E9E9"|0.3 |width="42" align="right" style="background-color:#E9E9E9"|250 |width="42" align="right" style="background-color:#E9E9E9"|250 |width="42" align="right" style="background-color:#E9E9E9"|0 |width="42" align="right" style="background-color:#E9E9E9"|100.00 |width="43" align="right" style="background-color:#E9E9E9"|0.0 |width="40" style="text-align:right;background-color:#E9E9E9"|— |- |colspan=2|Blank ballots |42,494||0.74||0.1||colspan=6 rowspan=4| |- |colspan=2|Invalid ballots |104,276||1.83||0.1 |- |colspan=2 align=left style="background-color:#E9E9E9"|Total |width="65" align="right" style="background-color:#E9E9E9"|5,707,695 |width="42" align="right" style="background-color:#E9E9E9"|100.00 |width="42" align="right" style="background-color:#E9E9E9"| |- |colspan=2|Registered voters/turnout ||7,337,064||77.79||6.1 |- | colspan=11 align=left | Source: Comissão Nacional de Eleições, Mapa oficial. D.R. n.º 121, Suplemento, Série I de 1983-05-26 |} Distribution by constituency |- class="unsortable" !rowspan=2|Constituency!!%!!S!!%!!S!!%!!S!!%!!S !rowspan=2|TotalS |- class="unsortable" style="text-align:center;" !colspan=2 | PS !colspan=2 | PSD !colspan=2 | APU !colspan=2 | CDS |- | style="text-align:left;" | Azores | 31.1 | 2 | style="background:; color:white;"|54.4 | 3 | 3.1 | - | 4.7 | - | 5 |- | style="text-align:left;" | Aveiro | style="background:; color:white;"|36.6 | 6 | 34.8 | 6 | 7.0 | 1 | 16.4 | 2 | 15 |- | style="text-align:left;" | Beja | 28.0 | 2 | 11.8 | - | style="background:red; color:white;"|49.4 | 3 | 4.1 | - | 5 |- | style="text-align:left;" | Braga | style="background:; color:white;"|39.7 | 7 | 27.0 | 5 | 8.8 | 1 | 18.3 | 3 | 16 |- | style="text-align:left;" | Bragança | 30.4 | 1 | style="background:; color:white;"|35.8 | 2 | 4.8 | - | 20.9 | 1 | 4 |- | style="text-align:left;" | Castelo Branco | style="background:; color:white;"|37.1 | 3 | 30.6 | 2 | 11.3 | - | 13.2 | 1 | 6 |- | style="text-align:left;" | Coimbra | style="background:; color:white;"|45.3 | 6 | 27.8 | 3 | 10.7 | 1 | 10.2 | 1 | 11 |- | style="text-align:left;" | Évora | 23.9 | 1 | 18.6 | 1 | style="background:red; color:white;"|47.6 | 3 | 4.5 | - | 5 |- | style="text-align:left;" | Faro |