The Local Democracy and Boundary Commission for Wales keeps under review the electoral arrangements for the 22 principal councils, including the number of councillors and wards in each council area.
Mae Comisiwn Ffiniau a Democratiaeth Leol Cymru yn adolygu’r trefniadau etholiadol ar gyfer y 22 prif gyngor, gan gynnwys y nifer o gynghorwyr a wardiau ym mhob ardal cyngor.