| Municipality of Duplek | |
| Native Name: | Občina Duplek |
| Native Name Lang: | sl |
| Settlement Type: | Municipality |
| Coordinates: | 46.5167°N 61°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Slovenia |
| Leader Title: | Mayor |
| Leader Name: | Mitja Horvat |
| Unit Pref: | Metric |
| Area Total Km2: | 40.0 |
| Population Footnotes: | [1] |
| Population Total: | 5938 |
| Population As Of: | 2002 |
| Population Density Km2: | auto |
| Timezone1: | CET |
| Utc Offset1: | +01 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +02 |
The Municipality of Duplek (in Slovenian pronounced as /ˈduːplɛk/; Slovenian: Občina Duplek) is a small municipality in northeastern Slovenia. Its seat is Spodnji Duplek. The municipality lies on the left bank of the Drava River on the northwestern edge of the Slovene Hills (Slovenian: Slovenske gorice), about 10 km southeast of Maribor. The area is part of the traditional region of Styria. It is now included in the Drava Statistical Region.[2]
In addition to the municipal seat of Spodnji Duplek, the municipality also includes the following settlements: