Beyağaç is a municipality and district located in the Denizli Province of Turkey. It covers a total area of 333 km² (129 sq mi) and had a recorded population of 6,197 as of 2022.
The district shares borders with three other districts of Denizli Province: Kale to the north-west, Tavas to the south-east, and Acıpayam. To its west, it neighbors the central district and Köyceğiz district of Muğla Province. Notably, Beyağaç is geographically closer to the provincial seat of Muğla than to its own provincial center.
Among all districts within Denizli Province, Beyağaç is situated closest to the Turkish Riviera coastline along the Marmaris, Köyceğiz, and Fethiye axis.