| Election Name: | 2021 Sheffield City Council election |
| Flag Image: | Coat of arms of Sheffield City Council.png |
| Type: | Parliamentary |
| Ongoing: | no |
| Party Colour: | yes |
| Previous Election: | 2019 Sheffield City Council election |
| Previous Year: | 2019 |
| Next Election: | 2022 Sheffield City Council election |
| Next Year: | 2022 |
| Seats For Election: | One third of seats (28 of 84) to Sheffield City Council |
| Majority Seats: | 43 |
| Election Date: | 6 May 2021 |
| Party1: | Labour Party (UK) |
| Leader1: | Bob Johnson (lost seat) |
| Seats1: | 13 |
| Seat Change1: | 8 |
| Popular Vote1: | 51,257 |
| Percentage1: | 36.6% |
| Swing1: | 5.0 |
| Party2: | Liberal Democrats (UK) |
| Leader2: | Shaffaq Mohammed |
| Seats2: | 9 |
| Seat Change2: | 3 |
| Popular Vote2: | 28,773 |
| Percentage2: | 21.2% |
| Swing2: | 3.3 |
| Party4: | Green Party of England and Wales |
| Leader4: | Douglas Johnson |
| Seats4: | 6 |
| Seat Change4: | 5 |
| Popular Vote4: | 28,523 |
| Percentage4: | 20.4% |
| Swing4: | 2.1 |
| Party5: | Conservative Party (UK) |
| Leader5: | TBD |
| Seats5: | 1 |
| Seat Change5: | 1 |
| Popular Vote5: | 25,829 |
| Percentage5: | 18.4 |
| Swing5: | 10.4 |
| Map Size: | 320px |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | Labour |
| After Election: | No Overall Control (Lab/Grn coalition)[1] |
The 2021 Sheffield City Council election took place on 6 May 2021 to elect members of Sheffield City Council in England, as part of the nationwide local elections. The election was originally due to take place on 7 May 2020, but was postponed due to the COVID-19 pandemic.[2] One seat from each ward was up for election.
A delayed local governance referendum (held under the provisions of the Localism Act 2011) also took place at the same time as the local elections.
Three Labour seats had become vacant, and left unfilled since 2019. Michelle Cook (Broomhill & Sharrow Vale) resigned in February 2020, Olivia Blake (Walkley) resigned in March 2020 and Peter Rippon (Richmond) died in December 2020.
The result had the following consequences for the total number of seats on the Council after the elections:
| valign=top colspan="2" style="width: 100px" | Party | valign=top style="width: 126px" | Previous council | valign=top style="width: 94px" | New council | valign=top style="width: 30px" | +/- |
|---|---|---|---|---|---|---|---|
| Labour | align=center | 46 | align=center | 41 | align=center | 5 | |
| Liberal Democrats | align=center | 26 | align=center | 29 | align=center | 3 | |
| Green | align=center | 8 | align=center | 13 | align=center | 5 | |
| Conservative | align=center | 0 | align=center | 1 | align=center | 1 | |
| Independent | align=center | 1 | align=center | 0 | align=center | 1 | |
| Vacant | align=center | 3 | align=center | 0 | align=center | 3 | |
| Total | 84 | 84 | |||||
| Working majority | |||||||
The local government reform passed, changing the Council model from a cabinet system to a committee system.
* = defending councillor
Incumbent Liberal Democrat councillor Bob Pullin did not defend his seat.
Incumbent Labour councillor Sophie Wilson chose to contest Park & Arbourthorne ward.
Incumbent Labour councillor Jackie Drayton did not defend her seat.
Incumbent Labour councillor Anne Murphy chose to contest Manor Castle ward.
Incumbent Labour councillor Lewis Dagnall did not defend his seat.
Anne Murphy was a sitting councillor in Crookes & Crosspool.
Incumbent Labour councillor James Steinke did not defend his seat.
Sophie Wilson was a sitting councillor in Beighton.
There were two seats elected due to a vacancy resulting from the death of Labour councillor Peter Rippon a year earlier. Polling the highest number of votes, David Barker won the three-year term (reduced from four years due to the delayed elections), and Mike Drabble won the two-year term (reduced from three years).
Incumbent Liberal Democrat councillor David Baker did not defend his seat.
Jack Clarkson was originally elected for UKIP.
The Walkley seat was vacant since the Labour councillor Olivia Blake stood down after being elected to Parliament in 2019.