The local authorities with the highest percentage of Welsh speakers were Gwynedd (64.4%), Anglesey (55.8%) and Ceredigion (45.3%).
Yr awdurdodau lleol â’r canrannau uchaf o siaradwyr Cymraeg oedd Gwynedd (64.4%), Ynys Môn (55.8%) a Cheredigion (45.3%).