The highest percentages of people aged three years or older able to speak Welsh were in north-west Wales, with 64.4% in Gwynedd, and 55.8% in the Isle of Anglesey.
Roedd y canrannau uchaf o bobl tair oed neu'n hŷn sy’n gallu siarad Cymraeg yng ngogledd-orllewin Cymru, gyda 64.4% yng Ngwynedd a 55.8% yn Ynys Môn.