Of the 1,917 small areas in Wales, the percentage of people aged three years or older able to speak Welsh ranged from 86.3% (a small area within Gwynedd) to 3.8% (a small area within Blaenau Gwent).
O'r 1,917 o ardaloedd bach yng Nghymru, roedd canran y bobl tair oed neu'n hŷn sy'n gallu siarad Cymraeg yn amrywio o 86.3% (ardal fach yng Ngwynedd) i 3.8% (ardal fach ym Mlaenau Gwent).