| Image Coa: | DEU Arholzen COA.svg |
| Coordinates: | 51.8678°N 9.5706°W |
| Image Plan: | Arholzen in HOL.svg |
| State: | Niedersachsen |
| District: | Holzminden |
| Samtgemeinde: | Eschershausen-Stadtoldendorf |
| Elevation: | 229 |
| Area: | 5.33 |
| Postal Code: | 37627 |
| Area Code: | 05532 |
| Licence: | HOL |
| Gemeindeschlüssel: | 03 2 55 001 |
| Website: | www.stadtoldendorf.de |
| Mayor: | Karl Dehne |
| Party: | SPD |
Arholzen is a municipality in the district of Holzminden, in Lower Saxony, Germany.