The Valdostan regional election of 1978 took place on 25 June 1978.
The council was divided in a dozen of parties, with consequent political instability under the leadership of the Valdostan Union.
| Party | votes | votes (%) | seats | |||
|---|---|---|---|---|---|---|
| bgcolor=Silver | Valdostan Union | 18,318 | 24.8 | 9 | ||
| bgcolor=White | Christian Democracy | 15,723 | 21.2 | 7 | ||
| bgcolor=Red | Italian Communist Party | 14,442 | 19.5 | 6 | ||
| bgcolor=Lightyellow | Popular Democrats | 8,702 | 11.8 | 4 | ||
| bgcolor=Hotpink | Italian Socialist Party | 2,648 | 3.6 | 1 | ||
| bgcolor=Coral | Progressive Valdostan Union | 2,316 | 3.1 | 1 | ||
| bgcolor=Plum | Socialist Autonomy | 1,960 | 2.7 | 1 | ||
| bgcolor=Pink | Italian Democratic Socialist Party | 1,543 | 2.1 | 1 | ||
| bgcolor=Darkred | Proletarian Democracy | 1,454 | 2.0 | 1 | ||
| bgcolor=Lime | Italian Republican Party | 1,395 | 1.9 | 1 | ||
| bgcolor=Blue | Italian Liberal Party | 1,318 | 1.8 | 1 | ||
| bgcolor=Darkgray | Valdostan Craftsmen and Traders | 1,118 | 1.5 | 1 | ||
| bgcolor= | Radical Party | 976 | 1.3 | align=right | - | |
| bgcolor= | Italian Social Movement | 949 | 1.3 | align=right | - | |
| bgcolor= | Others | 81,153 | 1.6 | align=right | - | |
| Total | 74,015 | 100.0 | 35 | |||