According to the 2021 Census, 538,300 people aged three or over were able to speak Welsh in Wales, or 17.8% of the population.
Yn ôl Cyfrifiad 2021, roedd 538,300 o bobl tair oed neu hŷn yn gallu siarad Cymraeg yng Nghymru, neu 17.8% o’r boblogaeth.