Regional assembly may refer to:

• Regional Assemblies in the Czech Republic (Zastupitelstvo kraje) of regions of the Czech Republic
• Eastern Rumelian Regional Assembly (or Parliament), of the autonomous Ottoman province of Eastern Rumelia (in modern Bulgaria); the Plovdiv Regional Historical Museum now occupies the building
• Regional Assemblies in England
• Regional Assemblies of Eritrea
• Regional Assemblies of Ethiopia, of the nine ethnically-based administrative Regions of Ethiopia
• Conseil régional (Regional Council, or Assembly), see Regional councils of France
• Regional Assemblies of the Regierungsbezirk of Germany
• Regional Assemblies in Ireland
• Regional assemblies of ancient Macedon, see Macedon#Regional districts (Merides)
• ARMM Regional Legislative Assembly, Autonomous Region in Muslim Mindanao, Philippines, see Autonomous Region in Muslim Mindanao#Politics
• Regional Assembly of Parliamentarians of the Organisation of Eastern Caribbean States, to be created by the Economic Union Treaty
• Provincial assemblies of Pakistan, legislative bodies in the provinces and regions of Pakistan
• Assembleia Legislativa (Legislative Assemblies, or Parliaments) of the two Autonomous regions of Portugal: the Azores and Madeira
• Regional Assembly of Príncipe, since autonomy was granted within São Tomé and Príncipe in 1994
• South Tyrol Regional Assembly, Italy
• Southern Regional Assembly in Sudan, created by the Addis Ababa Agreement (1972), see History of Sudan (Nimeiri Era, 1969-1985)