| Election Name: | 1986 Stevenage Borough Council election[1] [2] |
| Country: | England |
| Type: | Parliamentary |
| Ongoing: | no |
| Party Colour: | yes |
| Previous Election: | 1984 Stevenage Borough Council election |
| Previous Year: | 1984 |
| Next Election: | 1987 Stevenage Borough Council election |
| Next Year: | 1987 |
| Seats For Election: | 13 of the 39 seats to Stevenage Borough Council |
| Majority Seats: | 20 |
| Election Date: | 8 May 1986 |
| Party1: | Labour Party (UK) |
| Seats Before1: | 26 |
| Seats1: | 9 |
| Seat Change1: | 3 |
| Seats After1: | 29 |
| Popular Vote1: | 11,497 |
| Percentage1: | 46.9% |
| Party2: | SDP–Liberal Alliance |
| Seats Before2: | 11 |
| Seats2: | 4 |
| Seat Change2: | 2 |
| Seats After2: | 9 |
| Popular Vote2: | 8,512 |
| Percentage2: | 34.7% |
| Party3: | Conservative Party (UK) |
| Seats Before3: | 2 |
| Seats3: | 0 |
| Seat Change3: | 1 |
| Seats After3: | 1 |
| Popular Vote3: | 4,472 |
| Percentage3: | 18.2% |
| Map Size: | 300px |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | Labour |
| After Election: | Labour |
The 1986 Stevenage Borough Council election took place on 8 May 1986. This was on the same day as other local elections. One third of the council was up for election; the seats which were last contested in 1982. The Labour Party retained control of the council, which it had held continuously since its creation in 1973.
|-bgcolor=#F6F6F6| colspan=2 style="text-align: right; margin-right: 1em" | Total| style="text-align: right;" | 13| colspan=5 || style="text-align: right;" | 24,535| style="text-align: right;" | |-|colspan="11" style="color:inherit;background:"||-| style="color:inherit;background:"|| colspan="10"| Labour holdAll comparisons in vote share are to the corresponding 1982 election.