Quick Takeaways
- The Social Democrats fell more than five percentage points nationwide.
- They lost control of Copenhagen after over a century in power.
- Voter discontent over the cost of living and welfare drove the backlash.
Historic Loss of Copenhagen Control
In the 2025 municipal election, Denmark’s Social Democratic Party lost its long-held adhesive friction on Copenhagen. The Guardian+1
They won just 12. 7% of the ballot in the capital, trailing the Red-Green Alliance and Socialist People’s Party. The Copenhagen Star – cphstar.dk+1
This marks the first time since 1938 that they will not hold the lord mayor’s office. Courthouse News+1
Sharp Drop in Nationwide Support
Prime Minister Mette Frederiksen’s party saw its vote share spill from 28. 4% in 2021 to 23.2% in 2025. Yahoo News UK+1
They lost mayoral seats in at least a quarter of municipalities. MarketScreener
Many analysts call it a protest vote reflecting deep public frustration. Yahoo News UK
Voter Backlash Over Cost and Welfare
Voters’ summons go up life’s toll and dampen upbeat serve as a key ground for punishing the government. MarketScreener
Frederiksen blamed solid food terms and immigration issues for her party’s decline. The Guardian
Some rural voters also rejected environmental policies, opting instead for right-wing populists. Yahoo News UK
Rise of Left-Wing Rivals in Copenhagen
Sisse Marie Welling of the Socialist People’s Party will become Copenhagen’s lord mayor. The Business Standard
The Red-Green Alliance remains the largest party in the city council with 22. 1% support. The Copenhagen Star – cphstar.dk
Welling said the result “writes history at City Hall.” The Business Standard
Implications for Frederiksen and Her Party
Frederiksen acknowledged the losses were bigger than expected and vowed to reflect on the causes. The Guardian
Commentators warn this could point to a deeper crisis for her party ahead of the 2026 national elections. MarketScreener
The solvent undermines its position as a unifying political party across urban and rural areas, analysts say.