Ym mis Mehefin 2016, cyhoeddodd y Gweinidog Cyllid a Llywodraeth Leol ar y pryd ei benderfyniad i newid blwyddyn etholiadau llywodraeth leol cyffredin o fis Mai 2016 i fis Mai 2017 fel na fyddai etholiadau llywodraeth leol yn cyd-daro ag etholiadau'r Cynulliad Cenedlaethol ac etholiadau Comisiynwyr Heddlu a Throseddu.
In June 2016, the then Minister for Finance and Local Government, announced his decision to change the year of the ordinary local government elections from May 2016 to May 2017 so that the local government elections would not coincide with the National Assembly and Police and Crime Commissioner elections.