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.

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Ranking · Data 2025 · Source: BFS

The largest municipalities by area in canton Obwalden (2025)

National ranking →

Kerns is the largest municipality by area in canton Obwalden: 92.6 km² (2025). Next come Giswil (86 km²) and Sarnen (76.9 km²). Source: swisstopo.

Ranking

swisstopo · 2025

Rank	Municipality	Area	Residents
1	Kerns	92.6 km²	6'557
2	Giswil	86 km²	4'013
3	Sarnen	76.9 km²	10'906
4	Engelberg	74.9 km²	4'377
5	Sachseln	57.5 km²	5'300
6	Alpnach	56.4 km²	6'594
7	Lungern	46.5 km²	2'132

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 Obwalden is the largest by area?: Kerns is the largest municipality by area in canton Obwalden, at 92.6 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.