Newport had the largest increase in population estimates due to rebasing, increasing by 2.0%, from 156,500 to 159,700 in mid-2021.
Gan Gasnewydd yr oedd y cynnydd mwyaf mewn amcangyfrifon poblogaeth o ganlyniad i ailsylfaenu, sef cynnydd o 2.0%, o 156,500 i 159,700 yng nghanol 2021.