| Image Coa: | DEU Seestermühe COA.svg |
| Coordinates: | 53.7°N 43°W |
| Image Plan: | Seestermühe in PI.svg |
| State: | Schleswig-Holstein |
| District: | Pinneberg |
| Amt: | Elmshorn-Land |
| Elevation: | 1 |
| Area: | 23.35 |
| Postal Code: | 25371 |
| Area Code: | 04125 |
| Licence: | PI |
| Gemeindeschlüssel: | 01 0 56 045 |
| Website: | www.elmshorn- land.de |
| Mayor: | Thorsten Rockel |
Seestermühe is a municipality in the district of Pinneberg, in Schleswig-Holstein, Germany.