A 1974 law on the temporary creation of regions installed a Walloon Regional Council (alongside a Flemish Regional Council), which were both abolished in 1977.
At the creation of the first (permanent) regional assemblies in 1980 (second state reform), the body was also called "Walloon Regional Council" (Conseil régional wallon).
Its members were the national representatives and senators elected in the Walloon Region, who thus by law held two offices simultaneously.

The fourth state reform (1993) transformed Belgium into a federal state and changed the "Walloon Regional Council" (Conseil régional wallon) into the "Council of the Walloon Region" (Conseil de la Région wallonne), which was directly elected for the first time on 21 May 1995.
Shortly before these elections, in April 1995, the Council adopted a resolution to use the terms "Walloon Parliament" (Parlement wallon) and "Walloon deputies" (députés wallons).

A 2005 constitutional amendment revised the official terminology for all community and regional councils into community and regional parliaments, changing the "Council of the Walloon Region" into the "Walloon Parliament" (Parlement wallon).

In 2015, the Parliament opted to use the term "Parliament of Wallonia" (Parlement de Wallonie) instead of "Walloon Parliament".
A 1974 law on the temporary creation of regions installed a Walloon Regional Council (alongside a Flemish Regional Council), which were both abolished in 1977. At the creation of the first (permanent) regional assemblies in 1980 (second state reform), the body was also called "Walloon Regional Council" (Conseil régional wallon). Its members were the national representatives and senators elected in the Walloon Region, who thus by law held two offices simultaneously.
The fourth state reform (1993) transformed Belgium into a federal state and changed the "Walloon Regional Council" (Conseil régional wallon) into the "Council of the Walloon Region" (Conseil de la Région wallonne), which was directly elected for the first time on 21 May 1995. Shortly before these elections, in April 1995, the Council adopted a resolution to use the terms "Walloon Parliament" (Parlement wallon) and "Walloon deputies" (députés wallons).
A 2005 constitutional amendment revised the official terminology for all community and regional councils into community and regional parliaments, changing the "Council of the Walloon Region" into the "Walloon Parliament" (Parlement wallon).
In 2015, the Parliament opted to use the term "Parliament of Wallonia" (Parlement de Wallonie) instead of "Walloon Parliament".
Parliament of Wallonia