| Image Coa: | DEU Groß Offenseth-Aspern COA.svg |
| Coordinates: | 53.8167°N 53°W |
| Image Plan: | Groß Offenseth-Aspern in PI.svg |
| State: | Schleswig-Holstein |
| District: | Pinneberg |
| Amt: | Rantzau |
| Elevation: | 14 |
| Area: | 10.56 |
| Postal Code: | 25355 |
| Area Code: | 04123 |
| Licence: | PI |
| Gemeindeschlüssel: | 01 0 56 017 |
| Website: | www.amt-rantzau.de |
| Mayor: | Werner Schlüter |
Groß Offenseth-Aspern is a municipality in the district of Pinneberg, in Schleswig-Holstein, Germany.