| Election Name: | 2018 Barnet London Borough Council election |
| Type: | Parliamentary |
| Previous Election: | 2014 Barnet London Borough Council election |
| Previous Year: | 2014 |
| Next Election: | 20122 Barnet London Borough Council election |
| Next Year: | 2022 |
| Election Date: | 3 May 2018 |
| Seats For Election: | All 63 seats to Barnet London Borough Council |
| Majority Seats: | 32 |
| Leader1: | Richard Cornelius |
| Party1: | Conservative Party (UK) |
| Leaders Seat1: | Totteridge |
| Last Election1: | 32 seats, 38.6% |
| Seats1: | 38 |
| Seat Change1: | 6 |
| Popular Vote1: | 50,340 |
| Percentage1: | 44.5% |
| Swing1: | 5.9% |
| Leader2: | Barry Rawlings |
| Party2: | Labour Party (UK) |
| Leaders Seat2: | Coppetts |
| Last Election2: | 30 seats, 36.4% |
| Seats2: | 25 |
| Seat Change2: | 5 |
| Popular Vote2: | 44,159 |
| Percentage2: | 39.0% |
| Swing2: | 2.7% |
| Map Size: | 340px |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | No overall control |
| After Election: | Conservative |
The 2018 Barnet Borough Council election took place on 3 May 2018 to elect members of Barnet Borough Council in England. It took place on the same day as other local elections in 2018. In the last election, the Conservatives won control of the council with 32 seats, compared to 30 for Labour and 1 for the Liberal Democrats. On 15 March 2018, following the resignation of a Conservative councillor, the council was in a state of no overall control. The election on 3 May 2018 saw the Conservatives take back overall control with a majority of 13.
On 20 September 2019 Gabriel Rozenberg (elected Conservative) joined the Liberal Democrats, citing his opposition to Brexit.[1] On 2 October, he was then followed by Jess Brayne (elected Labour) who also defected to the Liberal Democrats.[2]
At the last election in 2014, the Conservatives were re-elected with a reduced majority. Labour gained 9 seats from the Conservatives, but the Conservatives remained in office as a result of winning 2 seats from the Liberal Democrats in Childs Hill ward.
The Conservatives remained in control of the council with 32 seats until March 2018, when councillor Sury Khatri resigned his membership and role as party whip after being deselected as a Conservative candidate.[3] As a result, the Conservatives lost their majority on the council, leaving them as a minority administration.
Incumbent councillors are marked with an asterisk *.|}
Prior to the election, the composition of the council was:
| 31 | 30 | 1 | 1 | |
| Conservative | Labour |
After the election, the composition of the council was:
| 38 | 25 | |
| Conservative | Labour |
Pearce was a councillor for Cockfosters ward in the London Borough of Enfield prior to the election.
Farrier was a councillor for Burnt Oak ward prior to the election.
On September 20, 2019, Cllr Gabriel Rozenberg left the Conservatives to join the Liberal Democrats due to their stance on Brexit and the election of Boris Johnson as party leader.[5]
Ioannidis was a councillor for Brunswick Park ward prior to the election.
Trevethan was a councillor for Underhill prior to the election.
On February 25, 2019, Cllr Jessica Brayne left the Labour Party over their failure to tackle anti-Semitism and their stance on Brexit. She then joined the Liberal Democrats in September 2019.[6]