The Boundaries of Community Wards are also subject to change, along with the electoral arrangements of Town or Community Councils, for example the number of Councillors which are elected to councils.
Gellid hefyd newid Ffiniau Wardiau Cymunedol, ynghyd â threfniadau etholiadol Cynghorau Tref neu Gymuned, er enghraifft nifer y Cynghorwyr sy'n cael eu hethol i gynghorau.