The 2021 Barnsley Metropolitan Borough Council election took place on 6 May 2021 to elect members of Barnsley Metropolitan Borough Council in England. It took place on the same day as other local elections. The election was originally due to take place in May 2020, but was postponed due to the COVID-19 pandemic.
Nicola Sumner won on the toss of a coin. In the result this is shown as her winning an extra vote.