Ranking · Data 2025 · Source: BFS
The fastest-shrinking municipalities in canton Aargau
National ranking →Leimbach is shrinking fastest in canton Aargau: its population fell -2.6 % in 2025. Next come Rüfenach (-2.1 %) and Teufenthal (-1.7 %). The basis is the year’s population change. Source: FSO (BEVNAT).
Ranking
BFS · 2025| Rank | Municipality | Population change | Residents |
|---|---|---|---|
| 1 | Leimbach | -2.6% | 529 |
| 2 | Rüfenach | -2.1% | 869 |
| 3 | Teufenthal | -1.7% | 1'772 |
| 4 | Arni | -1.7% | 1'953 |
| 5 | Schlossrued | -1.7% | 878 |
| 6 | Fisibach | -1.7% | 595 |
| 7 | Unterlunkhofen | -1.5% | 1'662 |
| 8 | Hellikon | -1.5% | 837 |
| 9 | Islisberg | -1.5% | 682 |
| 10 | Killwangen | -1.4% | 2'272 |
| 11 | Schmiedrued | -1.3% | 1'145 |
| 12 | Büttikon | -1.3% | 1'155 |
| 13 | Tägerig | -1.2% | 1'528 |
| 14 | Abtwil | -1.2% | 1'107 |
| 15 | Moosleerau | -1.1% | 945 |
| 16 | Dintikon | -1% | 2'405 |
| 17 | Mettauertal | -0.9% | 2'156 |
| 18 | Wegenstetten | -0.9% | 1'008 |
| 19 | Schneisingen | -0.8% | 1'551 |
| 20 | Döttingen | -0.8% | 4'525 |
| 21 | Schafisheim | -0.8% | 3'131 |
| 22 | Kallern | -0.7% | 419 |
| 23 | Vordemwald | -0.6% | 2'026 |
| 24 | Jonen | -0.6% | 2'333 |
| 25 | Oberrohrdorf | -0.5% | 4'265 |
| 26 | Mönthal | -0.5% | 391 |
| 27 | Oberlunkhofen | -0.5% | 2'196 |
| 28 | Birmenstorf | -0.4% | 3'053 |
| 29 | Dottikon | -0.4% | 4'240 |
| 30 | Lengnau | -0.4% | 2'944 |
| 31 | Strengelbach | -0.4% | 5'080 |
| 32 | Oeschgen | -0.3% | 1'181 |
| 33 | Möhlin | -0.3% | 11'351 |
| 34 | Gansingen | -0.3% | 1'125 |
| 35 | Biberstein | -0.2% | 1'653 |
| 36 | Habsburg | -0.2% | 430 |
| 37 | Beinwil am See | -0.2% | 3'711 |
| 38 | Ehrendingen | -0.2% | 4'919 |
| 39 | Uezwil | -0.2% | 553 |
| 40 | Schwaderloch | -0.1% | 727 |
| 41 | Bergdietikon | -0.1% | 2'993 |
| 42 | Veltheim | -0.1% | 1'598 |
| 43 | Ammerswil | -0.1% | 801 |
| 44 | Bottenwil | -0.1% | 862 |
| 45 | Fislisbach | -0.1% | 6'134 |
| 46 | Leuggern | -0.1% | 2'442 |
| 47 | Stetten | -0% | 2'540 |
| 48 | Schinznach | -0% | 2'461 |
| 49 | Gipf-Oberfrick | -0% | 3'886 |
| 50 | Safenwil | -0% | 4'629 |
| 51 | Mandach | 0% | 328 |
| 52 | Remigen | 0% | 1'380 |
| 53 | Bözberg | 0% | 1'696 |
| 54 | Sisseln | 0% | 1'653 |
| 55 | Oberrüti | 0.1% | 1'631 |
| 56 | Lenzburg | 0.1% | 11'322 |
| 57 | Uerkheim | 0.1% | 1'442 |
| 58 | Gränichen | 0.1% | 8'699 |
| 59 | Mellingen | 0.1% | 6'324 |
| 60 | Oberkulm | 0.1% | 3'026 |
| 61 | Zurzach | 0.1% | 8'346 |
| 62 | Mumpf | 0.1% | 1'565 |
| 63 | Birrwil | 0.1% | 1'416 |
| 64 | Unterkulm | 0.2% | 3'807 |
| 65 | Bünzen | 0.2% | 1'247 |
| 66 | Staufen | 0.2% | 4'411 |
| 67 | Muhen | 0.2% | 4'099 |
| 68 | Niederwil | 0.2% | 3'030 |
| 69 | Auenstein | 0.2% | 1'747 |
| 70 | Erlinsbach | 0.2% | 4'650 |
| 71 | Zeihen | 0.2% | 1'268 |
| 72 | Brittnau | 0.3% | 4'350 |
| 73 | Klingnau | 0.3% | 3'710 |
| 74 | Holziken | 0.3% | 1'768 |
| 75 | Remetschwil | 0.3% | 2'102 |
| 76 | Bremgarten | 0.4% | 8'902 |
| 77 | Sarmenstorf | 0.4% | 3'194 |
| 78 | Magden | 0.4% | 3'903 |
| 79 | Küttigen | 0.4% | 7'025 |
| 80 | Geltwil | 0.4% | 242 |
| 81 | Birr | 0.4% | 4'868 |
| 82 | Bellikon | 0.4% | 1'587 |
| 83 | Seengen | 0.5% | 4'516 |
| 84 | Rudolfstetten-Friedlisberg | 0.5% | 4'667 |
| 85 | Hirschthal | 0.5% | 1'772 |
| 86 | Berikon | 0.5% | 5'026 |
| 87 | Oftringen | 0.5% | 15'198 |
| 88 | Kölliken | 0.5% | 5'133 |
| 89 | Gebenstorf | 0.6% | 5'840 |
| 90 | Villmergen | 0.6% | 8'290 |
| 91 | Obersiggenthal | 0.6% | 9'020 |
| 92 | Meisterschwanden | 0.6% | 3'330 |
| 93 | Laufenburg | 0.6% | 3'882 |
| 94 | Buttwil | 0.6% | 1'305 |
| 95 | Unterentfelden | 0.6% | 4'579 |
| 96 | Brugg | 0.6% | 13'615 |
| 97 | Baden | 0.7% | 24'012 |
| 98 | Beinwil (Freiamt) | 0.7% | 1'318 |
| 99 | Eggenwil | 0.8% | 1'063 |
| 100 | Möriken-Wildegg | 0.8% | 5'025 |
| 101 | Koblenz AG | 0.8% | 1'835 |
| 102 | Wettingen | 0.8% | 22'027 |
| 103 | Full-Reuenthal | 0.8% | 1'021 |
| 104 | Untersiggenthal | 0.8% | 7'875 |
| 105 | Niederlenz | 0.8% | 4'998 |
| 106 | Obermumpf | 0.8% | 1'090 |
| 107 | Rothrist | 0.8% | 9'979 |
| 108 | Hendschiken | 0.9% | 1'399 |
| 109 | Wallbach | 0.9% | 2'084 |
| 110 | Aarau | 1% | 22'932 |
| 111 | Zuzgen | 1% | 918 |
| 112 | Neuenhof | 1% | 9'306 |
| 113 | Auw | 1% | 2'325 |
| 114 | Leutwil | 1.1% | 763 |
| 115 | Schöftland | 1.1% | 4'658 |
| 116 | Zufikon | 1.1% | 4'960 |
| 117 | Künten | 1.1% | 1'978 |
| 118 | Wohlenschwil | 1.1% | 1'876 |
| 119 | Seon | 1.1% | 5'716 |
| 120 | Würenlingen | 1.2% | 5'323 |
| 121 | Villigen | 1.2% | 2'257 |
| 122 | Niederrohrdorf | 1.2% | 4'751 |
| 123 | Suhr | 1.2% | 11'760 |
| 124 | Kirchleerau | 1.3% | 950 |
| 125 | Oberentfelden | 1.3% | 9'061 |
| 126 | Münchwilen | 1.3% | 1'091 |
| 127 | Dürrenäsch | 1.3% | 1'393 |
| 128 | Merenschwand | 1.3% | 3'945 |
| 129 | Mellikon | 1.3% | 227 |
| 130 | Egliswil | 1.4% | 1'627 |
| 131 | Aarburg | 1.4% | 9'040 |
| 132 | Zofingen | 1.4% | 13'054 |
| 133 | Wittnau | 1.4% | 1'449 |
| 134 | Boniswil | 1.4% | 1'795 |
| 135 | Rupperswil | 1.4% | 6'317 |
| 136 | Endingen | 1.5% | 2'758 |
| 137 | Zetzwil | 1.5% | 1'402 |
| 138 | Böztal | 1.5% | 2'985 |
| 139 | Freienwil | 1.6% | 1'117 |
| 140 | Rheinfelden | 1.6% | 14'034 |
| 141 | Hallwil | 1.6% | 1'040 |
| 142 | Mühlau | 1.6% | 1'368 |
| 143 | Sins | 1.6% | 4'561 |
| 144 | Muri | 1.6% | 8'850 |
| 145 | Windisch | 1.6% | 8'286 |
| 146 | Würenlos | 1.7% | 7'046 |
| 147 | Riniken | 1.7% | 1'594 |
| 148 | Olsberg | 1.7% | 366 |
| 149 | Tegerfelden | 1.7% | 1'326 |
| 150 | Gontenschwil | 1.8% | 2'249 |
| 151 | Buchs | 1.9% | 8'651 |
| 152 | Oberhof | 1.9% | 595 |
| 153 | Murgenthal | 1.9% | 3'188 |
| 154 | Wohlen | 1.9% | 18'162 |
| 155 | Densbüren | 2% | 784 |
| 156 | Hausen | 2% | 3'850 |
| 157 | Fahrwangen | 2% | 2'587 |
| 158 | Hunzenschwil | 2.1% | 4'472 |
| 159 | Leibstadt | 2.1% | 1'639 |
| 160 | Eiken | 2.3% | 2'573 |
| 161 | Zeiningen | 2.3% | 2'604 |
| 162 | Reinach | 2.3% | 9'858 |
| 163 | Böttstein | 2.4% | 4'428 |
| 164 | Staffelbach | 2.4% | 1'398 |
| 165 | Lupfig | 2.4% | 3'484 |
| 166 | Widen | 2.5% | 3'909 |
| 167 | Birrhard | 2.5% | 993 |
| 168 | Holderbank | 2.6% | 1'610 |
| 169 | Reitnau | 2.6% | 1'663 |
| 170 | Wölflinswil | 2.6% | 1'105 |
| 171 | Ennetbaden | 2.7% | 3'801 |
| 172 | Menziken | 2.7% | 8'909 |
| 173 | Oberwil-Lieli | 2.7% | 2'699 |
| 174 | Kaiseraugst | 2.8% | 5'985 |
| 175 | Bettwil | 2.8% | 736 |
| 176 | Thalheim | 2.9% | 984 |
| 177 | Wiliberg | 2.9% | 175 |
| 178 | Boswil | 3.1% | 3'209 |
| 179 | Aristau | 3.2% | 1'655 |
| 180 | Mägenwil | 3.3% | 2'305 |
| 181 | Waltenschwil | 3.3% | 3'291 |
| 182 | Mülligen | 3.3% | 1'124 |
| 183 | Herznach-Ueken | 3.7% | 2'765 |
| 184 | Kaisten | 4% | 3'063 |
| 185 | Dietwil | 4.2% | 1'476 |
| 186 | Othmarsingen | 4.2% | 3'301 |
| 187 | Stein | 4.2% | 3'660 |
| 188 | Schupfart | 4.4% | 922 |
| 189 | Hägglingen | 4.6% | 2'707 |
| 190 | Frick | 4.8% | 6'211 |
| 191 | Rottenschwil | 5.5% | 1'013 |
| 192 | Brunegg | 5.5% | 971 |
| 193 | Spreitenbach | 6.3% | 13'377 |
| 194 | Besenbüren | 6.3% | 677 |
| 195 | Fischbach-Göslikon | 8.9% | 1'887 |
| 196 | Siglistorf | 9% | 871 |
BEVNAT (Statistik der natürlichen Bevölkerungsbewegung) 2025 · Federal Statistical Office (FSO), retrieved 11.09.2026
How we measure this
BFSChange in the permanent resident population during calendar year 2025, in percent of the population on 1 January, from the FSO statistics on natural population movement (BEVNAT) and migration. This ranking shows the same measure from the other end: the steepest declines first. A negative value means shrinkage.
Frequently asked questions
- Which municipality in canton Aargau is shrinking fastest?
- Leimbach: -2.6 % population in 2025 — the steepest decline of any municipality in canton Aargau. Source: FSO (BEVNAT).
- Why do some municipalities shrink?
- The year’s population change comes from births, deaths and in/out-migration (FSO BEVNAT). When deaths and departures outweigh births and arrivals, the population falls. The percentage makes small and large municipalities comparable.