Saint-Denis and Pierrefitte-sur-Seine Merge to Form Île-de-France's Second Largest City

The merger, effective January 1, 2025, consolidates resources but faces criticism over its political motivations and lack of public consultation.

The fusion of Saint-Denis and Pierrefitte-sur-Seine creates a new municipality with 149,781 residents, making it the second-largest city in Île-de-France after Paris.
The merger was approved by municipal councils in May 2024 without mandatory public consultation, as allowed by French law for such reorganizations.
Supporters argue the consolidation will enhance national influence, secure financial benefits, and improve public services, including reduced taxes for Pierrefitte residents.
Critics, including opposition leaders and local activists, claim the move is a political strategy to bolster socialist voter bases ahead of the 2026 municipal elections.
The new municipality will receive a €6.74 million state grant over three years but faces challenges in managing reduced tax revenues and administrative restructuring.