| Election Name: | 2011 Northampton Borough Council election |
| Country: | England |
| Type: | Parliamentary |
| Ongoing: | no |
| Party Colour: | yes |
| Previous Election: | 2007 Northampton Borough Council election |
| Previous Year: | 2007 |
| Next Election: | 2015 Northampton Borough Council election |
| Next Year: | 2015 |
| Seats For Election: | All 45 seats in the Northampton Borough Council |
| Majority Seats: | 23 |
| Election Date: | 5 May 2011 |
| Party1: | Conservative Party (UK) |
| Last Election1: | 15 |
| Seats1: | 26 |
| Seat Change1: | 11 |
| Popular Vote1: | 36,122 |
| Percentage1: | 42.7 |
| Party2: | Labour Party (UK) |
| Last Election2: | 5 |
| Seats2: | 15 |
| Seat Change2: | 10 |
| Popular Vote2: | 18,807 |
| Percentage2: | 22.3 |
| Party3: | Liberal Democrats (UK) |
| Last Election3: | 26 |
| Seats3: | 4 |
| Seat Change3: | 22 |
| Popular Vote3: | 21,235 |
| Percentage3: | 25.1 |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | Liberal Democrats |
| After Election: | Conservative |
Elections to Northampton Borough Council were held on 5 May 2011. The whole council was up for election and the Liberal Democrats Lost overall control of the council to the Conservative Party. There was no General Election taking place at the same time.
There were significant changes to the borough council in 2011 compared to the 2007 Borough election so that it is not possible to record all gains and losses. There were 45 seats in 2011 compared to 47 in 2007 with many changes to individual seats.
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The number in brackets after the ward name is the number of councillors to be elected. An asterisk after the name (*) indicate the candidate was elected. Candidates are list in order of number of votes. 'Turnout' indicates the number of ballot papers issued followed by the percentage of registered voters voting. Votes could be cast for 1 up to 3 candidates in some cases, though voting for more than the specified number would disqualify the ballot paper. Several wards were changed in 2011 from those in 2007 - it is therefore not possible to indicate all gains and holds in some cases.