We know from Census 2021 data that the population of Wales is estimated to have increased by 1.4% since 2011, and this is due to more people moving into Wales than leaving Wales.
Rydym y gwybod o ddata Cyfrifiad 2021 bod poblogaeth Cymru wedi cynyddu tua 1.4% ers 2011, ac mae hyn oherwydd bod rhagor o bobl wedi symud i Gymru nag sydd wedi gadael.