| Election Name: | 2021 Barnsley Metropolitan Borough Council election |
| Country: | England |
| Type: | Parliamentary |
| Ongoing: | yes |
| Party Colour: | yes |
| Previous Election: | 2019 Barnsley Metropolitan Borough Council election |
| Previous Year: | 2019 |
| Next Election: | 2022 Barnsley Metropolitan Borough Council election |
| Next Year: | 2022 |
| Majority Seats: | 32 |
| Election Date: | 6 May 2021 |
| Party1: | Labour Party (UK) |
| Last Election1: | 19 seats, 58.9% |
| Seats Before1: | 48 |
| Party2: | Liberal Democrats (UK) |
| Last Election2: | 1 seat, 9.8% |
| Seats Before2: | 4 |
| Seats Needed2: | 28 |
| Party3: | Conservative Party (UK) |
| Last Election3: | 3 seats, 18.1% |
| Seats Before3: | 3 |
| Seats Needed3: | 29 |
| Party4: | Democrats and Veterans |
| Last Election4: | 0 seats, 1.7% |
| Seats Before4: | 0 |
| Seats Needed4: | 32 |
| Party5: | Independent (politician) |
| Last Election5: | 0 seats, 1.9% |
| Seats Before5: | 4 |
| council control | |
| Posttitle: | Council control after election |
| Before Election: | Majority administration |
| Before Party: | Labour |
The 2021 Barnsley Metropolitan Borough Council election took place in 2021 to elect members of Barnsley Metropolitan Borough Council in England. It took place on the same day as other local elections.[1] The election was originally due to take place in May 2020, but was postponed due to the COVID-19 pandemic.[2]
Nicola Sumner won on the toss of a coin. In the result this is shown as her winning an extra vote.