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 2023 · Source: BFS

The largest municipalities by area in canton Solothurn (2023)

National ranking →

Mümliswil-Ramiswil is the largest municipality by area in canton Solothurn: 35.5 km² (2023). Next come Grenchen (26 km²) and Buchegg (25.7 km²). Source: swisstopo.

Ranking

swisstopo · 2023

Rank	Municipality	Area	Residents
1	Mümliswil-Ramiswil	35.5 km²	2'451
2	Grenchen	26 km²	18'295
3	Buchegg	25.7 km²	2'926
4	Welschenrohr-Gänsbrunnen	24.5 km²	1'205
5	Beinwil	22.7 km²	274
6	Selzach	19.5 km²	3'682
7	Herbetswil	16.3 km²	605
8	Seewen	16.3 km²	1'064
9	Kleinlützel	16.3 km²	1'197
10	Balsthal	15.7 km²	6'501
11	Laupersdorf	15.5 km²	1'897
12	Hägendorf	13.9 km²	5'277
13	Lostorf	13.3 km²	4'088
14	Aedermannsdorf	12.9 km²	599
15	Biberist	12.3 km²	9'345
16	Bettlach	12.2 km²	4'978
17	Oensingen	12.1 km²	6'636
18	Messen	11.9 km²	1'496
19	Oberdorf	11.9 km²	1'859
20	Olten	11.5 km²	18'715
21	Matzendorf	11.3 km²	1'374
22	Bärschwil	11.2 km²	794
23	Nunningen	10.3 km²	1'973
24	Oberbuchsiten	9.4 km²	2'386
25	Erlinsbach	8.9 km²	3'691
26	Rüttenen	8.8 km²	1'541
27	Kestenholz	8.6 km²	1'881
28	Metzerlen-Mariastein	8.5 km²	973
29	Kienberg	8.5 km²	528
30	Hochwald	8.4 km²	1'266
31	Stüsslingen	8.4 km²	1'257
32	Holderbank	7.8 km²	753
33	Lüsslingen-Nennigkofen	7.8 km²	1'140
34	Trimbach	7.6 km²	6'667
35	Deitingen	7.6 km²	2'340
36	Büsserach	7.6 km²	2'431
37	Hofstetten-Flüh	7.5 km²	3'401
38	Erschwil	7.4 km²	960
39	Schnottwil	7.2 km²	1'150
40	Riedholz	7.2 km²	2'313
41	Neuendorf	7.1 km²	2'404
42	Egerkingen	7 km²	4'300
43	Wangen bei Olten	7 km²	5'539
44	Wolfwil	6.9 km²	2'401
45	Breitenbach	6.8 km²	4'304
46	Nuglar-St. Pantaleon	6.3 km²	1'546
47	Subingen	6.3 km²	3'285
48	Solothurn	6.3 km²	16'855
49	Büren	6.2 km²	1'055
50	Gempen	6 km²	932
51	Dulliken	6 km²	5'396
52	Himmelried	6 km²	977
53	Dornach	5.8 km²	6'862
54	Lommiswil	5.8 km²	1'630
55	Gretzenbach	5.8 km²	2'800
56	Meltingen	5.8 km²	645
57	Derendingen	5.6 km²	7'008
58	Härkingen	5.5 km²	1'767
59	Niederbuchsiten	5.5 km²	1'301
60	Aeschi	5.5 km²	1'329
61	Balm bei Günsberg	5.5 km²	226
62	Rodersdorf	5.4 km²	1'418
63	Hauenstein-Ifenthal	5.4 km²	325
64	Däniken	5.4 km²	3'041
65	Bellach	5.3 km²	5'453
66	Günsberg	5.3 km²	1'185
67	Kappel	5.1 km²	3'511
68	Wisen	4.8 km²	443
69	Zuchwil	4.6 km²	9'452
70	Drei Höfe	4.6 km²	742
71	Lohn-Ammannsegg	4.5 km²	2'976
72	Luterbach	4.5 km²	3'640
73	Fulenbach	4.5 km²	1'808
74	Walterswil	4.5 km²	749
75	Lüterkofen-Ichertswil	4.4 km²	904
76	Niedergösgen	4.3 km²	4'197
77	Biezwil	4.2 km²	354
78	Winznau	3.9 km²	2'058
79	Gunzgen	3.9 km²	1'712
80	Schönenwerd	3.7 km²	5'201
81	Zullwil	3.7 km²	675
82	Obergösgen	3.6 km²	2'457
83	Etziken	3.4 km²	1'070
84	Recherswil	3.4 km²	2'180
85	Flumenthal	3.1 km²	1'043
86	Grindel	3.1 km²	517
87	Boningen	2.8 km²	807
88	Rickenbach	2.8 km²	1'198
89	Witterswil	2.7 km²	1'467
90	Horriwil	2.6 km²	911
91	Feldbrunnen-St. Niklaus	2.5 km²	1'027
92	Oekingen	2.4 km²	868
93	Bolken	2.1 km²	593
94	Langendorf	2 km²	3'858
95	Gerlafingen	1.9 km²	5'794
96	Starrkirch-Wil	1.9 km²	1'956
97	Halten	1.9 km²	854
98	Eppenberg-Wöschnau	1.8 km²	326
99	Bättwil	1.7 km²	1'191
100	Unterramsern	1.6 km²	220
101	Obergerlafingen	1.5 km²	1'262
102	Fehren	1.5 km²	595
103	Hubersdorf	1.4 km²	717
104	Kriegstetten	1.1 km²	1'427
105	Hüniken	1 km²	160
106	Kammersrohr	1 km²	31

How we measure this

swisstopo

Municipal area in square kilometres from swisstopo's official boundaries (swissBOUNDARIES3D), as of 2023. It covers the total area including forest, water and unproductive land.

Frequently asked questions

Which municipality in canton Solothurn is the largest by area?: Mümliswil-Ramiswil is the largest municipality by area in canton Solothurn, at 35.5 km² (2023).
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.