| Image Coa: | DEU Kollmar COA.svg |
| Coordinates: | 53.75°N 39°W |
| Image Plan: | Kollmar in IZ.png |
| State: | Schleswig-Holstein |
| District: | Steinburg |
| Amt: | Horst-Herzhorn |
| Elevation: | 0 |
| Area: | 32.82 |
| Postal Code: | 25377 |
| Area Code: | 04124, 04128 |
| Licence: | IZ |
| Gemeindeschlüssel: | 01 0 61 118 |
| Mayor: | Jens Brockmüller |
Kollmar is a municipality in the district of Steinburg, in Schleswig-Holstein, Germany.