The ONS, who is responsible for the census in Wales and in England, issued a press release on 4 May to report that 97% of households had responded to the 2021 Census across Wales and England.
Cyhoeddodd yr ONS, sy'n gyfrifol am y cyfrifiad yng Nghymru ac yn Lloegr, ddatganiad i'r wasg ar 4 Mai i roi gwybod bod 97% o aelwydydd wedi ymateb i Gyfrifiad 2021 ledled Cymru a Lloegr.