The Office for National Statistics (ONS), who is responsible for the census in Wales and England, aims to publish 2021 Census data between spring 2022 and spring 2023.
Mae’r Swyddfa Ystadegau Gwladol, sy’n gyfrifol am y cyfrifiad yng Nghymru a Lloegr, am gyhoeddi data Cyfrifiad 2021 rhwng gwanwyn 2022 a gwanwyn 2023.