the local authorities whose populations are projected to increase the most are Newport (by 7.2%), the Vale of Glamorgan (by 6.0%) and Bridgend (by 4.6%)
yr awdurdodau lleol yr amcanestynnir y bydd eu poblogaeth yn cynyddu fwyaf ydy Casnewydd (7.2%), Bro Morgannwg (6.0%) a Phen-y-bont ar Ogwr (4.6%)