The Social Democrats face potential setbacks in the Copenhagen region ahead of Denmark’s municipal elections on 18 November 2025, with multiple town halls in the capital area at risk, according to new local analyses. The picture is fluid across Copenhagen, Frederiksberg, Roskilde, Køge and Hillerød, while Helsingør could flip the other way and become a rare gain for the party.
Copenhagen stakes: SF challenges Social Democrats
In Copenhagen, the contest for the Lord Mayor (Overborgmester) is the cycle’s headline race. Social Democrats candidate Pernille Rosenkrantz-Theil faces a strong push from SF and its high-profile city leader Sisse Marie Welling.
Polling history and 2021 results indicate that the Red–Green Alliance (Enhedslisten) and SF can together outsize the Social Democrats, forcing complex negotiations on election night. With Liberal Alliance signalling openness to support SF under some scenarios, the final outcome may hinge on cross-bloc bargaining and policy concessions.
Frederiksberg rematch tests conservative comeback
On Frederiksberg, the Conservatives (Det Konservative Folkeparti) seek to reclaim their historic stronghold after losing the mayoralty in 2021. Incumbent Michael Vindfeldt (S) benefits from an incumbency effect, but the opposition has regrouped under Michael Brautsch (C). A narrow split between left and right—and the pivotal role of Venstre’s Jan E. Jørgensen in post‑vote talks—could again decide who wears the chain of office.
Roskilde and Hillerød: tight coalitions could unseat S
In Roskilde, the Social Democrats lost their absolute majority in 2021 and now face an emboldened field. A centre‑right slate could form a governing majority if it reaches the “magic number” of seats, while SF—projected to advance—may be the kingmaker. In Hillerød, long‑time mayor Kirsten Jensen (S) confronts simultaneous bids from Conservatives and Venstre, with SF presenting a credible fourth path if alliances break its way. Both councils are within a few mandates of a change.
Køge spotlight: a national S figure under pressure
In Køge, vice‑chair of the Social Democrats Marie Stærke (S) defends a seat she has held for most of the past 15 years. A broad blue electoral alliance—knit together to minimise wasted votes—puts Venstre’s Ken Kristensen in striking distance. With the council split down the middle in the current term, Radikale Venstre could once again determine which bloc assembles a majority.
Helsingør twist: potential Social Democrat pickup
While several capital‑area town halls look vulnerable for S, Helsingør presents a different dynamic. Thomas Horn (S) is competitive against incumbent Benedikte Kiær (C) after shifting local alliances disrupted the Conservative-led coalition. If Moderaterne and local actors split the centre‑right vote, S could seize a symbolic win on the Øresund coast.
What to watch before 18 November
Across the capital region, the common thread is fragmented party systems and pre‑arranged electoral alliances designed to optimise seat allocation. Expect intensive coffee‑table talks among party leaders, informal confidence deals, and late‑stage pledges on signature policies (housing, transport, welfare services) to secure post‑election majorities.
The Social Democrats enter the campaign as defending champions in many councils but not the default winners. In several municipalities around Copenhagen, the mayor’s chain will likely be decided not at the ballot box alone, but at the negotiating table overnight.
