Orhaneli is a municipality and district of Bursa Province, Turkey. Its area is 838 km<sup>2</sup>, and its population is 18,543 (2022).
From 1867 until 1922, Orhaneli (then named Adranos) was part of Hüdavendigâr vilayet. The district has been significantly impacted by wildfires during the summer of 2025.
There are 61 neighbourhoods in Orhaneli District: