On the day of the census, the residential population in Wales was 3,107,500; this is the highest population ever to be recorded in a census in Wales.
Ar ddiwrnod y cyfrifiad, maint y boblogaeth breswyl yng Nghymru oedd 3,107,500; dyma'r boblogaeth fwyaf a gofnodwyd erioed drwy gyfrifiad yng Nghymru.