Communes du district
| Commune | NPA | Habitants |
|---|---|---|
| Ammerswil | 5600 | 802 |
| Boniswil | 5706 +1 | 1 770 |
| Brunegg | 5505 | 920 |
| Dintikon | 5606 | 2 428 |
| Egliswil | 5704 +1 | 1 605 |
| Fahrwangen | 5615 | 2 536 |
| Hallwil | 5705 +1 | 1 024 |
| Hendschiken | 5604 | 1 387 |
| Holderbank (AG) | 5113 | 1 570 |
| Hunzenschwil | 5502 | 4 382 |
| Lenzburg | 5600 | 11 314 |
| Meisterschwanden | 5616 +2 | 3 310 |
| Möriken-Wildegg | 5103 | 4 987 |
| Niederlenz | 5702 +1 | 4 958 |
| Othmarsingen | 5504 +1 | 3 168 |
| Rupperswil | 5102 +1 | 6 229 |
| Schafisheim | 5503 | 3 155 |
| Seengen | 5707 | 4 494 |
| Seon | 5703 | 5 652 |
| Staufen | 5603 | 4 402 |
Numéros postaux
- 5102 Rupperswil
- 5103 Möriken AG
- 5113 Holderbank AG
- 5502 Hunzenschwil
- 5503 Schafisheim
- 5504 Othmarsingen
- 5505 Brunegg
- 5600 Lenzburg
- 5603 Staufen
- 5604 Hendschiken
- 5606 Dintikon
- 5615 Fahrwangen
- 5616 Meisterschwanden
- 5617 Tennwil
- 5702 Niederlenz
- 5703 Seon
- 5704 Egliswil
- 5705 Hallwil
- 5706 Boniswil
- 5707 Seengen