The European Parliament election of 1989 took place on 18 June 1989.
Christian Democracy was the largest party in Sardinia. Mario Melis (Sardinian Action Party) was re-elected to the European Parliament in the Islands constituency, thanks to an alliance with several regionalist parties notably including the Valdostan Union.
| Parties | votes | votes (%) | |
|---|---|---|---|
| Christian Democracy | 331,590 | 35.9 | |
| Italian Communist Party | 256,353 | 27.8 | |
| Italian Socialist Party | 110,763 | 12.0 | |
| Sardinian Action Party | 98,175 | 10.6 | |
| Italian Social Movement | 34,024 | 3.7 | |
| Italian Democratic Socialist Party | 26,841 | 2.9 | |
| Italian Republican Party–Italian Liberal Party | 19,592 | 2.1 | |
| Federation of Green Lists | 17,955 | 1.9 | |
| Anti-Prohibition List | 11,685 | 1.3 | |
| Rainbow Greens | 8,551 | 0.9 | |
| Proletarian Democracy | 7,409 | 0.8 | |
| Others | 821 | 0.1 | |
| Total | 923,759 | 100.0 |