| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Jaggisbachau | city | Kanton Aargau | Switzerland | 46.95 | 7.3166667 | 1827 | 56213 |
| Jaun | city | Kanton Aargau | Switzerland | 46.6 | 7.2833333 | 4895 | 2185 |
| Javernaz | city | Kanton Aargau | Switzerland | 46.2333333 | 7.05 | 5810 | 8317 |
| Javerne | city | Kanton Aargau | Switzerland | 46.2333333 | 7.05 | 5810 | 8317 |
| Jegenstorf | city | Kanton Aargau | Switzerland | 47.05 | 7.5 | 1699 | 27292 |
| Jeli | city | Kanton Aargau | Switzerland | 46.9333333 | 9.5166667 | 2293 | 12139 |
| Jenaz | city | Kanton Aargau | Switzerland | 46.9333333 | 9.7 | 2496 | 3680 |
| Jenins | city | Kanton Aargau | Switzerland | 47 | 9.5666667 | 3120 | 14826 |
| Jerisberg | city | Kanton Aargau | Switzerland | 46.95 | 7.2 | 1614 | 19935 |
| Jerisberghof | city | Kanton Aargau | Switzerland | 46.95 | 7.2 | 1614 | 19935 |
| Jeuss | city | Kanton Aargau | Switzerland | 46.9 | 7.1666667 | 1761 | 20041 |
| Jona | city | Kanton Aargau | Switzerland | 47.25 | 8.85 | 1515 | 57832 |
| Jonen | city | Kanton Aargau | Switzerland | 47.3 | 8.4 | 1502 | 42146 |
| Jonschwil | city | Kanton Aargau | Switzerland | 47.4333333 | 9.0833333 | 1935 | 45212 |
| Juf | city | Kanton Aargau | Switzerland | 46.45 | 9.5833333 | 8284 | 231 |
| Jussy | city | Kanton Aargau | Switzerland | 46.25 | 6.2833333 | 1601 | 56375 |
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