Which municipality in canton Solothurn is the most densely populated?

Gerlafingen is the most densely populated municipality in canton Solothurn with 3'167 residents per km² (2025).

How is population density calculated?

Permanent residents (BFS STATPOP) divided by the official municipal area in km² from swisstopo swissBOUNDARIES3D, including lakes and unproductive land.

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Ranking · Data 2025 · Source: BFS

The most densely populated municipalities in canton Solothurn (2025)

National ranking →

Gerlafingen is the most densely populated municipality in canton Solothurn: 3'167 residents per km² (2025). It is followed by Solothurn (2'680/km²) and Zuchwil (2'078/km²). Sources: BFS population, swisstopo boundaries.

Ranking

BFS + swisstopo · 2025

Rank	Municipality	Density	Residents
1	Gerlafingen	3'167	5'859
2	Solothurn	2'680	16'830
3	Zuchwil	2'078	9'622
4	Langendorf	2'043	3'983
5	Olten	1'677	19'265
6	Schönenwerd	1'465	5'437
7	Derendingen	1'282	7'219
8	Dornach	1'191	6'898
9	Starrkirch-Wil	1'092	2'020
10	Bellach	1'065	5'632
11	Niedergösgen	995	4'297
12	Trimbach	912	6'928
13	Dulliken	909	5'489
14	Luterbach	831	3'756
15	Obergerlafingen	816	1'232
16	Wangen bei Olten	804	5'598
17	Biberist	778	9'531
18	Grenchen	729	18'973
19	Bättwil	710	1'185
20	Kappel	704	3'591
21	Obergösgen	703	2'553
22	Recherswil	673	2'260
23	Lohn-Ammannsegg	656	2'940
24	Breitenbach	653	4'440
25	Egerkingen	628	4'365
26	Däniken	572	3'108
27	Oensingen	559	6'766
28	Witterswil	552	1'475
29	Hubersdorf	539	727
30	Subingen	528	3'311
31	Winznau	523	2'061
32	Gretzenbach	485	2'825
33	Gunzgen	454	1'783
34	Hofstetten-Flüh	453	3'410
35	Rickenbach	438	1'208
36	Feldbrunnen-St. Niklaus	425	1'068
37	Erlinsbach	424	3'761
38	Balsthal	422	6'622
39	Fehren	418	619
40	Fulenbach	411	1'841
41	Bettlach	405	4'935
42	Hägendorf	383	5'343
43	Wolfwil	359	2'473
44	Horriwil	356	940
45	Neuendorf	338	2'412
46	Flumenthal	329	1'023
47	Büsserach	328	2'473
48	Etziken	324	1'093
49	Riedholz	324	2'319
50	Härkingen	320	1'763
51	Deitingen	317	2'409
52	Lostorf	310	4'113
53	Boningen	296	816
54	Lommiswil	280	1'615
55	Bolken	273	579
56	Kriegstetten	271	1'456
57	Rodersdorf	261	1'398
58	Oberbuchsiten	254	2'382
59	Niederbuchsiten	249	1'369
60	Nuglar-St. Pantaleon	249	1'580
61	Aeschi	245	1'342
62	Günsberg	222	1'169
63	Kestenholz	220	1'888
64	Lüterkofen-Ichertswil	208	923
65	Selzach	193	3'750
66	Zullwil	192	704
67	Nunningen	189	1'948
68	Eppenberg-Wöschnau	186	336
69	Rüttenen	171	1'498
70	Walterswil	171	768
71	Büren	170	1'060
72	Grindel	165	508
73	Schnottwil	162	1'159
74	Himmelried	162	974
75	Drei Höfe	159	727
76	Hüniken	157	160
77	Gempen	153	919
78	Hochwald	153	1'278
79	Oberdorf	152	1'806
80	Stüsslingen	151	1'265
81	Unterramsern	146	230
82	Lüsslingen-Nennigkofen	145	1'131
83	Erschwil	134	996
84	Matzendorf	128	1'439
85	Messen	127	1'506
86	Laupersdorf	124	1'916
87	Buchegg	116	2'979
88	Metzerlen-Mariastein	114	970
89	Meltingen	108	623
90	Holderbank	100	779
91	Wisen	94	451
92	Biezwil	83	345
93	Kleinlützel	73	1'190
94	Bärschwil	72	806
95	Mümliswil-Ramiswil	70	2'472
96	Seewen	67	1'088
97	Hauenstein-Ifenthal	65	348
98	Kienberg	62	526
99	Welschenrohr-Gänsbrunnen	49	1'199
100	Aedermannsdorf	47	607
101	Balm bei Günsberg	39	213
102	Herbetswil	38	617
103	Kammersrohr	34	32
104	Beinwil	11	248

STATPOP 2025 · Federal Statistical Office (FSO), retrieved 31.08.2026

How we measure this

BFS + swisstopo

Permanent residents (BFS STATPOP 2025) divided by the official municipal area from swissBOUNDARIES3D (swisstopo). Lakes and unproductive areas are included in the official area figure.

Frequently asked questions

Which municipality in canton Solothurn is the most densely populated?: Gerlafingen is the most densely populated municipality in canton Solothurn with 3'167 residents per km² (2025).
How is population density calculated?: Permanent residents (BFS STATPOP) divided by the official municipal area in km² from swisstopo swissBOUNDARIES3D, including lakes and unproductive land.