| Type: | province |
| Other Name: | Düzce ili |
| Seat: | Düzce |
| Leader Name: | Selçuk Aslan |
| Area Total Km2: | 2492 |
| Leader Title: | Governor |
| Population Total: | 405131 |
| Population As Of: | 2022 |
| Area Code: | 0380 |
Düzce Province (tr|{{italics correction|Düzce ili) is a province in northwestern Turkey. The province is on the coastline of the Black Sea and is traversed by the main highway between Istanbul and Ankara. The primary town is Düzce, located in the center of the province. There are ancient Greek ruins in the province. Düzce separated from the Bolu province and became a province in its own right after a devastating earthquake in the city in November 1999. Its area is 2,492 km2,[1] and its population is 405,131 (2022).[2]
Düzce province is divided into 8 districts (capital district in bold):
Air pollution is a chronic problem in the province.[3]