Uccle: very good transparency, largest municipality by area

Mayor : Valentine Delwart (MR)Coalition : MR-DéFI, Ecolo-Groen

Population : 86 806Postal code : 1180Area : 22.9 km²Council seats : 43

Up to date · 16 Feb 2026

Transparency grid

5/6 criteria

Budget online

Yes

Council minutes online

Yes

Council livestream

Yes

Municipal Open Data

Participation platform

Yes

Mandate registry

Yes

Key figures

86 806

Population

IBSA

22,9km²

Superficie

IBSA

Alerts

MR-Ecolo coalition renewed for 2024-20301 November 2024
Change of mayor: Dilliès appointed Minister-President, Valentine Delwart (MR) succeeds him14 February 2026

The largest municipality by area

Uccle is the largest municipality in the Brussels Region by area (22.9 km²) and the fifth by population (nearly 87,000 inhabitants). A residential and green municipality, it is governed by a renewed MR-DéFI + Ecolo-Groen coalition.

Transparency: 5 out of 6 criteria

Uccle achieves a very good score. The budget and council minutes (with dedicated archives) are published online, the council is broadcast via livestream on YouTube, the mandate registry is accessible, and the municipality runs a participatory budget of EUR 150,000 via the MonOpinion platform. Only the Open Data portal is missing.

Citizen participation: MonOpinion

Uccle uses the MonOpinion platform (based on Decidim) for its participatory budget of EUR 150,000, allowing citizens to propose and vote on improvement projects for the municipality.

Sources

Official

Site officiel Uccle(12 February 2026)
Uccle — participation citoyenne(12 February 2026)

Regional

IBSA — chiffres clés Uccle(12 February 2026)

Last updated: 16 February 2026

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