| Image Coa: | DEU Armstedt COA.svg |
| Coordinates: | 53.9667°N 60°W |
| Image Plan: | Armstedt in SE.svg |
| State: | Schleswig-Holstein |
| District: | Segeberg |
| Amt: | Bad Bramstedt-Land |
| Elevation: | 22 |
| Area: | 8.92 |
| Postal Code: | 24616 |
| Area Code: | 04324 |
| Licence: | SE |
| Gemeindeschlüssel: | 01 0 60 003 |
| Website: | http://www.armstedt.de/ |
| Mayor: | Maren Horstmann |
Armstedt is a municipality in the district of Segeberg, in Schleswig-Holstein, Germany.