| Seth | |
| Image Coa: | DEU Seth (Holstein) COA.svg |
| Coordinates: | 53.85°N 20°W |
| Image Plan: | Seth in SE.svg |
| State: | Schleswig-Holstein |
| District: | Segeberg |
| Amt: | Itzstedt |
| Elevation: | 34 |
| Area: | 10.55 |
| Postal Code: | 23845 |
| Area Code: | 04194 |
| Licence: | SE |
| Gemeindeschlüssel: | 01 0 60 076 |
| Website: | www.amt-itzstedt.eu |
| Mayor: | Simon Herda |
| Party: | CDU |
Seth is a municipality in the district of Segeberg, in Schleswig-Holstein, Germany.