2025 Sønderborg municipal election

2025 Sønderborg municipal election
18 November 2025
All 31 seats to the Sønderborg municipal council
16 seats needed for a majority
Turnout41,239 (68.8%)
0.2%
  First party Second party Third party
 
A
V
I
Party Social Democrats Venstre Liberal Alliance
Last election 14 seats, 43.4% 11 seats, 30.2% 0 seats, 0.3%
Seats won 13 8 3
Seat change 1 3 3
Popular vote 15,682 9,830 3,590
Percentage 38.7% 24.3% 8.9%
Swing 4.7% 5.9% 8.5%
  Fourth party Fifth party Sixth party
 
O
Æ
F
Party Danish People's Party Denmark Democrats Green Left
Last election 1 seat, 4.1% Did not stand 0 seats, 2.0%
Seats won 2 2 1
Seat change 1 2 1
Popular vote 2,758 2,077 1,875
Percentage 6.8% 5.1% 4.6%
Swing 2.7% New 2.6%
  Seventh party Eighth party
 
S
Ø
Party Schleswig Party Red-Green Alliance
Last election 3 seats, 8.0% 1 seat, 2.1%
Seats won 1 1
Seat change 2 0
Popular vote 1,566 1,559
Percentage 3.9% 3.9%
Swing 4.2% 1.8%
Mayor before election

Erik Lauritzen
Social Democrats

Mayor after election

Erik Lauritzen
Social Democrats

The 2025 Sønderborg Municipal election was held on November 18, 2025, to elect the 31 members to sit in the regional council for the Sønderborg Municipal council, in the period of 2026 to 2029.[1] Erik Lauritzen from the Social Democrats, would secure re-election. [2]

Background

Following the 2021 election, Erik Lauritsen from Social Democrats became mayor for his third term. [3] He ran for the mayoral position for a fourth term. [4]

Electoral system

For elections to Danish municipalities, a number varying from 9 to 31 are chosen to be elected to the municipal council. The seats are then allocated using the D'Hondt method and a closed list proportional representation. Sønderborg Municipality had 31 seats in 2025.

Electoral alliances

Source[5]

Electoral Alliance 1

Party Political alignment
C Conservatives Centre-right
I Liberal Alliance Centre-right to Right-wing
O Danish People's Party Right-wing to Far-right
Æ Denmark Democrats Right-wing to Far-right

Electoral Alliance 2

Party Political alignment
F Green Left Centre-left to Left-wing
Ø Red-Green Alliance Left-wing to Far-Left
Å The Alternative Centre-left to Left-wing

Electoral Alliance 3

Party Political alignment
K Christian Democrats Centre to Centre-right
M Moderates Centre to Centre-right
S Schleswig Party Centre (Regionalism)

Results by polling station

Division A C E F G I K M O S V Æ Ø Å
% % % % % % % % % % % % % %
Nordborg 41.9 1.1 0.3 5.6 0.2 8.0 0.1 0.2 8.1 2.4 22.3 7.5 2.0 0.2
Havnbjerg 40.9 1.1 0.7 7.9 0.4 9.2 0.4 0.4 8.0 3.1 17.7 8.2 1.8 0.1
Egen 33.9 1.1 0.3 4.9 0.5 11.1 0.3 0.3 8.5 2.8 27.1 7.1 2.1 0.1
Fynshav 32.8 1.1 0.5 3.4 0.2 4.7 1.1 0.5 7.8 2.6 33.1 6.5 5.4 0.1
Augustenborg 37.4 1.2 0.3 3.6 0.3 11.1 0.4 0.3 7.5 1.6 27.9 5.2 3.0 0.0
Hørup 36.0 2.5 0.4 4.3 0.3 8.9 0.3 0.2 5.1 3.1 32.6 3.2 2.6 0.2
Sydals 25.3 1.0 1.3 5.8 0.6 4.9 0.4 0.3 7.9 2.7 39.9 7.0 2.6 0.1
Kegnæs 41.1 1.7 3.1 7.5 0.0 5.8 0.0 0.0 6.2 3.8 21.2 6.2 3.4 0.0
Humlehøj, Sønderborg 44.5 2.2 0.5 4.3 0.5 7.4 0.4 0.4 7.1 2.9 18.8 5.1 5.7 0.3
Sønderskov, Sønderborg 44.5 2.8 0.1 5.1 0.4 6.9 0.4 0.7 6.5 3.8 18.2 3.5 6.8 0.3
Kongevej, Sønderborg 40.1 3.4 0.2 5.7 0.3 8.2 0.2 0.7 4.9 4.3 23.2 2.9 5.5 0.4
Dybbøl 42.4 2.9 0.2 3.9 0.4 8.5 0.3 0.8 5.5 3.5 24.0 3.8 3.9 0.1
Vester Sottrup 36.5 2.2 0.3 3.3 0.3 9.1 0.4 0.6 7.3 3.8 27.1 6.3 2.6 0.1
Ullerup 33.8 1.8 0.2 3.4 0.2 8.6 0.6 0.1 9.0 3.3 27.1 9.2 2.0 0.5
Broager 32.0 1.8 0.5 5.1 0.0 14.3 0.1 0.8 6.2 5.9 25.4 5.3 2.7 0.1
Gråsten 37.5 1.8 0.3 3.6 0.1 10.8 0.2 0.6 6.7 7.4 24.1 4.0 2.7 0.2
Kværs 20.9 1.7 0.4 2.4 0.4 10.5 0.2 0.4 14.3 6.6 24.4 14.3 3.2 0.2

Results

Party Votes % +/- Seats +/-
Sønderborg Municipality
A Social Democrats 15,682 38.74 -4.69 13 -1
V Venstre 9,830 24.29 -5.90 8 -3
I Liberal Alliance 3,590 8.87 +8.53 3 +3
O Danish People's Party 2,758 6.81 +2.71 2 +1
Æ Denmark Democrats 2,077 5.13 New 2 New
F Green Left 1,875 4.63 +2.63 1 +1
S Schleswig Party 1,566 3.87 -4.16 1 -2
Ø Red-Green Alliance 1,559 3.85 +1.75 1 0
C Conservatives 842 2.08 -0.53 0 0
M Moderates 207 0.51 New 0 New
E Vibeke Schou - Personlig Frihed 155 0.38 New 0 New
K Christian Democrats 131 0.32 New 0 New
G Alssundpartiet 125 0.31 New 0 New
Å The Alternative 79 0.20 New 0 New
Total 40,476 100 N/A 31 N/A
Invalid votes 181 0.30 -0.07
Blank votes 582 0.97 +0.19
Turnout 41,239 68.84 -0.23
Source: valg.dk

Opinion polls

Polling
firm		 Fieldwork
date		 Sample
size		 A V S O C Ø F I E G K M Å Æ Others Lead
Sønderborg Statsskole 31 Oct - 9 Nov 2025 654 28.0 15.0 7.2 6.3 2.0 9.0 9.2 14.7 0.8 0.5 0.0 1.1 0.5 6.0 – 13.0
Epinion 4 Sep - 13 Oct 2025 461 39.7 19.6 3.8 6.3 2.8 2.3 5.8 9.7 – – – 0.5 0.8 8.3 0.2 20.1
2024 european parliament election 9 Jun 2024 20.0 19.7 – 8.9 7.6 3.4 11.5 6.9 – – – 5.7 1.5 10.5 – 0.3
2022 general election 1 Nov 2022 33.5 15.2 – 2.9 3.8 2.2 4.7 6.5 – – 0.5 8.4 1.2 11.3 – 18.3
2021 regional election 16 Nov 2021 33.3 42.7 – 3.9 3.5 2.8 3.3 0.7 – – 0.5 – 0.3 – – 9.4
2021 municipal election 16 Nov 2021 43.4
(14)		 30.2
(11)		 8.0
(3)		 4.1
(1)		 2.6
(0)		 2.1
(1)		 2.0
(0)		 0.3
(0)		 – – – – – – – 13.2

References

  1. ^ "Kommunalvalg". valg.im.dk (in Danish). Retrieved 2025-05-26.
  2. ^ "KV25: Erik Lauritzen fortsætter som borgmester i Sønderborg". sonderborgnyt.dk (in Danish). Retrieved 2025-11-21.
  3. ^ "Rørt borgmester i Sønderborg fortsætter på posten: Jeg er pavestolt | Nyheder". dr.dk (in Danish). Retrieved 2023-05-26.
  4. ^ "Socialdemokratiet genopstiller borgmester til valg". tvsyd.dk (in Danish). Retrieved 2025-05-26.
  5. ^ "Stemmefordeling i Sønderborg Kommune". valg.dk (in Danish). Retrieved 7 October 2025.
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