Is water area included in the municipal area?

Yes. The figure is swisstopo's official total area including lakes, forest and unproductive land — not just the built-up zone.

← Canton Basel-City overview

Ranking · Data 2025 · Source: BFS

The largest municipalities by area in canton Basel-City (2025)

National ranking →

Basel is the largest municipality by area in canton Basel-City: 23.9 km² (2025). Next come Riehen (10.9 km²) and Bettingen (2.2 km²). Source: swisstopo.

Ranking

swisstopo · 2025

Rank	Municipality	Area	Residents
1	Basel	23.9 km²	180'097
2	Riehen	10.9 km²	22'774
3	Bettingen	2.2 km²	1'286

swisstopo, retrieved 24.08.2026

How we measure this

swisstopo

Municipal area in square kilometres from swisstopo's official boundaries (swissBOUNDARIES3D), as of 2025. It covers the total area including forest, water and unproductive land.

Frequently asked questions

Which municipality in canton Basel-City is the largest by area?: Basel is the largest municipality by area in canton Basel-City, at 23.9 km² (2025).
Is water area included in the municipal area?: Yes. The figure is swisstopo's official total area including lakes, forest and unproductive land — not just the built-up zone.