See main article: 2023 Northern Ireland local elections.
| Election Name: | 2023 Lisburn and Castlereagh City Council election |
| Flag Image: | Flag placeholder.svg |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | 2019 Lisburn and Castlereagh City Council election |
| Previous Year: | 2019 |
| Next Year: | 2027 |
| Seats For Election: | All 40 council seats |
| Majority Seats: | 21 |
| Election Date: | 18 May 2023 |
| Leader1: | Jeffrey Donaldson |
| Party1: | Democratic Unionist Party |
| Seats1: | 14 |
| Seat Change1: | 1 |
| Popular Vote1: | 19,187 |
| Percentage1: | 34.0% |
| Swing1: | 2.7% |
| Leader2: | Naomi Long |
| Party2: | Alliance Party of Northern Ireland |
| Seats2: | 13 |
| Seat Change2: | 4 |
| Popular Vote2: | 16,064 |
| Percentage2: | 28.5% |
| Swing2: | 4.9% |
| Leader3: | Doug Beattie |
| Party3: | Ulster Unionist Party |
| Seats3: | 6 |
| Seat Change3: | 5 |
| Popular Vote3: | 7,877 |
| Percentage3: | 14.0% |
| Swing3: | 3.6% |
| Leader4: | Michelle O'Neill |
| Party4: | Sinn Féin |
| Seats4: | 4 |
| Seat Change4: | 2 |
| Popular Vote4: | 6,193 |
| Percentage4: | 11.0% |
| Swing4: | 5.6% |
| Leader5: | Colum Eastwood |
| Party5: | Social Democratic and Labour Party |
| Seats5: | 2 |
| Seat Change5: | 0 |
| Popular Vote5: | 3,774 |
| Percentage5: | 6.7% |
| Swing5: | 2.0% |
| Party6: | Independent (politician) |
| Seats6: | 1 |
| Seat Change6: | 1 |
| Popular Vote6: | 1,017 |
| Percentage6: | 1.8% |
| Swing6: | 0.1% |
| Council control | |
| Posttitle: | Council control after election |
| Before Election: | No overall control |
| After Election: | TBC |
| Last Election5: | 2 |
| Last Election2: | 9 |
| Last Election3: | 11 |
| Last Election1: | 15 |
| Last Election4: | 2 |
| Last Election6: | 0 |
The 2023 election to Lisburn and Castlereagh City Council was held on 18 May 2023, alongside other local elections in Northern Ireland, two weeks after local elections in England.[1] The Northern Ireland elections were delayed by 2 weeks to avoid overlapping with the coronation of King Charles III.[2]
The election returned 40 members to the council via Single Transferable Vote. This consisted of 14 Democratic Unionist Party members (who topped the polls in three districts: Castlereagh East, Downshire East and Lisburn South), 13 Alliance Party members (who topped the polls in two districts: Castlereagh South and Downshire West), 6 Ulster Unionist Party members, 4 Sinn Féin members (who topped the polls in two districts: Killultagh and Lisburn North), 2 Social Democratic and Labour Party members and 1 Independent member.
|-| colspan="2" style="background-color:#f2f2f2;text-align:center;margin-bottom:-1px;border:1px solid #aaa;padding:.2em .4em" | | style="text-align:right;" | 40|| |||| style="text-align:right;" | 56,404|
Note: "Votes" are the first preference votes.
|- class="unsortable" align="centre"!rowspan=2 align="left"|District Electoral Area (DEA)! %
!Cllrs
! %
!Cllrs
! %
!Cllrs
! %
!Cllrs
! %
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!rowspan=2|Total
cllrs
|- class="unsortable" align="center"!colspan=2 bgcolor="" | DUP!colspan=2 bgcolor="" | Alliance!colspan=2 bgcolor="" | UUP!colspan=2 bgcolor="" | Sinn Féin!colspan=2 bgcolor=""| SDLP!colspan=2 bgcolor="white"|
2019: 3 x DUP, 2 x Alliance, 1 x UUP
2023: 3 x DUP, 2 x Alliance, 1 x UUP
2019–2023 Change: No change
2019: 2 x Alliance, 1 x DUP, 1 x SDLP, 1 x Sinn Féin, 1 x UUP, 1 x Green
2023: 3 x Alliance, 2 x Sinn Féin, 1 x DUP, 1 x SDLP
2019–2023 Change: Alliance and Sinn Féin gain from Green and UUP
2019: 2 x DUP, 2 x UUP, 1 x Alliance
2023: 2 x DUP, 2 x Alliance, 1 x UUP
2019–2023 Change: Alliance gain from UUP
2019: 2 x DUP, 2 x UUP, 1 x Alliance
2023: 2 x DUP, 2 x Alliance, 1 x UUP
2019–2023 Change: Alliance gain from UUP
2019: 2 x DUP, 1 x Alliance, 1 x UUP, 1 x Sinn Féin
2023: 2 x DUP, 1 x Sinn Féin, 1 x Alliance, 1 x UUP
2019–2023 Change: No change
2019: 2 x DUP, 2 x UUP, 1 x Alliance, 1 x SDLP
2023: 1 x DUP, 1 x Alliance, 1 x Sinn Féin, 1 x UUP, 1 x SDLP, 1 x Independent
2019–2023 Change: Sinn Féin and Independent gain from DUP and UUP
2019: 3 x DUP, 2 x UUP, 1 x Alliance
2023: 3 x DUP, 2 x Alliance, 1 x UUP
2019–2023 Change: Alliance gain from UUP