The highest percentages of people aged three years or older able to speak Welsh were in Gwynedd (64.4%) and the Isle of Anglesey (55.8%).
Roedd y canrannau uchaf o bobl tair oed neu'n hŷn a oedd yn gallu siarad Cymraeg yng Ngwynedd (64.4%) ac Ynys Môn (55.8%).