Buca is a municipality and district located in the İzmir Province of Turkey. Covering an area of 178 km2, it serves as a significant geographical component of the region's infrastructure.
The district is characterized by its large population, totaling 523,193 as of 2024, making it the most populous district in İzmir Province. Geographically, Buca encompasses the southeastern portion of the İzmir agglomeration and extends into the surrounding countryside.