The 2023 election to Newry, Mourne and Down District Council was held on 18 May 2023, alongside other local elections in Northern Ireland, two weeks after local elections in England. The Northern Ireland elections were delayed by 2 weeks to avoid overlapping with the coronation of King Charles III.

41 members were returned to the council via Single Transferable Vote.

Election results

| colspan="2" style="background-color:#f2f2f2;text-align:center;margin-bottom:-1px;border:1px solid #aaa;padding:.2em .4em" | Total | style="text-align:right;" | 41

| style="text-align:right;" | 76,643 |<noinclude>

Note: "Votes" are the first preference votes.

The 2023 LG election in NMD saw the further decline of the SDLP and UUP, whereas Sinn Fein and Alliance made gains, with the DUP also gaining two councillors.

Districts summary

|- class="unsortable" align="centre" !rowspan=2 align="left"|District Electoral Area (DEA) ! % !Cllrs ! % !Cllrs ! % !Cllrs ! % !Cllrs ! % !Cllrs ! % !Cllrs !rowspan=2|Totalcllrs |- class="unsortable" align="center" !colspan=2 bgcolor="" | Sinn Féin !colspan=2 bgcolor=""| SDLP !colspan=2 bgcolor="" | DUP !colspan=2 bgcolor="" | Alliance !colspan=2 bgcolor="" | UUP !colspan=2 bgcolor="white"| Independents and others |- |align="left"|Crotlieve |bgcolor="#008800"|45.67 |bgcolor="#008800"|3 1 |17.74 |1 1 |4.57 |0 |5.03 |0 |3.42 |0 |23.57 |2 |6 |- |align="left"|Downpatrick |bgcolor="#008800"|43.45 |bgcolor="#008800"|2 1 |30.71 |2 1 |3.27 |0 |13.75 |1 1 |2.45 |0 |6.37 |0 1 |5 |- |align="left"|Newry |bgcolor="#008800"|65.15 |bgcolor="#008800"|4 1 |18.15 |2 |0.00 |0 |7.94 |0 |2.72 |0 |6.04 |0 1 |6 |- |align="left"|Rowallane |10.78 |0 |16.42 |1 |bgcolor="#D46A4C"|34.17 |bgcolor="#D46A4C"|2 |24.59 |2 1 |12.91 |0 1 |1.12 |0 |5 |- |align="left"|Slieve Croob |bgcolor="#008800"|47.56 |bgcolor="#008800"|3 1 |11.68 |0 1 |19.34 |1 1 |13.28 |1 |4.30 |0 1 |3.85 |0 |5 |- |align="left"|Slieve Gullion |bgcolor="#008800"|67.92 |bgcolor="#008800"|5 |16.00 |1 |2.45 |0 |2.03 |0 |8.15 |1 |3.46 |0 |7 |- |align="left"|The Mournes |bgcolor="#008800"|41.87 |bgcolor="#008800"|3 |12.91 |1 |25.65 |2 1 |8.27 |1 1 |3.82 |0 1 |7.47 |0 1 |7 |- class="unsortable" class="sortbottom" style="background:#C9C9C9" |align="left"| Total |48.32 |20 4 |17.18 |8 3 |11.90 |5 2 |9.36 |5 3 |5.30 |1 3 |7.93 |2 3 |41

District results

Crotlieve

2019: 2 x Sinn Féin, 2 x SDLP, 2 x Independent

2023: 3 x Sinn Féin, 2 x Independent, 1 x SDLP

2019–2023 Change: Sinn Féin gain from SDLP

Downpatrick

2019: 3 x SDLP, 1 x Sinn Féin, 1 x Independent

2023: 2 x Sinn Féin, 2 x SDLP, 1 x Alliance

2019–2023 Change: Sinn Féin and Alliance gain from SDLP and Independent

Newry

2019: 3 x Sinn Féin, 2 x SDLP, 1 x Independent

2023: 4 x Sinn Féin, 2 x SDLP

2019–2023 Change: Sinn Féin gain from Independent

Rowallane

2019: 2 x DUP, 1 x UUP, 1 x Alliance, 1 x SDLP

2023: 2 x DUP, 2 x Alliance, 1 x SDLP

2019–2023 Change: Alliance gain from UUP

Slieve Croob

2019: 2 x Sinn Féin, 1 x SDLP, 1 x UUP, 1 x Alliance

2023: 3 x Sinn Féin, 1 x DUP, 1 x Alliance

2019–2023 Change: Sinn Féin and DUP gain from SDLP and UUP

Slieve Gullion

2019: 5 x Sinn Féin, 1 x SDLP, 1 x UUP

2023: 5 x Sinn Féin, 1 x SDLP, 1 x UUP

2019–2023 Change: No change

The Mournes

2019: 3 x Sinn Féin, 1 x SDLP, 1 x DUP, 1 x UUP, 1 x Independent

2023: 3 x Sinn Féin, 2 x DUP, 1 x SDLP, 1 x Alliance

2019–2023 Change: DUP and Alliance gain from UUP and Independent

Changes during the term † Co-options Date co-optedElectoral AreaPartyOutgoingCo-opteeReason13 November 2023Newry Michael SavageKillian FeehanSavage resigned.24 May 2024Slieve Croob Andrew McMurrayHelena YoungMcMurray was co-opted to the Northern Ireland Assembly.7 March 2025Slieve Gullion Aoife FinneganMartin HeartyFinnegan was co-opted to the Northern Ireland Assembly.10 September 2025Downpatrick Gareth SharvinAurla KingSharvin resigned.18 December 2025Slieve Gullion Leeanne McEvoyNiall LawlorMcEvoy resigned.

‡ Changes in affiliation DateElectoral AreaNamePrevious affiliationNew affiliationCircumstance30 July 2025DownpatrickCadogan Enright Left Alliance due to disagreements over local issues such as the Downe Hospital.

Notes

References