Disgwylir i'r etholiad cyffredinol ar gyfer aelodaeth o'r Senedd gael ei gynnal ar 6 Mai 2021, ynghyd ag etholiadau Comisiynydd yr Heddlu a Throseddu ac unrhyw is-etholiadau llywodraeth leol a ohiriwyd ac a bennwyd ar gyfer y dyddiad hwnnw gan Swyddogion Canlyniadau.
The ordinary general election for membership of the Senedd is due to take place on 6 May 2021, alongside Police and Crime Commissioner elections and any postponed local government by elections fixed for that date by Returning Officers.