| Election Name: | 2021 Stevenage Borough Council election |
| Country: | England |
| Type: | Parliamentary |
| Ongoing: | no |
| Party Colour: | yes |
| Previous Election: | 2019 Stevenage Borough Council election |
| Previous Year: | 2019 |
| Next Election: | 2022 Stevenage Borough Council election |
| Next Year: | 2022 |
| Seats For Election: | 14 of the 39 seats to Stevenage Borough Council |
| Majority Seats: | 20 |
| Election Date: | 6 May 2021 |
| Party1: | Labour Party (UK) |
| Seats Before1: | 27 |
| Seats1: | 6 |
| Seat Change1: | 5 |
| Seats After1: | 22 |
| Party2: | Conservative Party (UK) |
| Seats Before2: | 7 |
| Seats2: | 6 |
| Seat Change2: | 4 |
| Seats After2: | 11 |
| Party3: | Liberal Democrats (UK) |
| Seats Before3: | 5 |
| Seats3: | 2 |
| Seat Change3: | 1 |
| Seats After3: | 6 |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | Labour |
| After Election: | Labour |
Elections to Stevenage Borough Council took place on 6 May 2021. This was on the same day as other local elections across the United Kingdom. One third of the council was up for election, plus a by-election in Roebuck ward; the seats which were last contested in 2016.[1] The Labour Party retained control of the council, which it has held continuously since 1973, but with a reduced majority.