Mae Swyddogion Canlyniadau Rhanbarthol yn gyfrifol am y gwaith cyffredinol o reoli’r etholiad ac am gydgysylltu trefniadau’r bleidlais ranbarthol ar gyfer y Senedd.
Regional Returning Officers are responsible for the overall management and of the election and responsible for co-ordinating arrangements for the regional poll in their respective Senedd electoral regions.