The lowest percentages of people aged three years or older able to speak Welsh were in Blaenau Gwent (6.2%) and Newport (7.5%).
Roedd y canrannau isaf o bobl tair oed neu'n hŷn a oedd yn gallu siarad Cymraeg ym Mlaenau Gwent ((6.2%) a Chasnewydd (7.5%).