Tunasan is a barangay in the city of Muntinlupa, Philippines. It is one of the nine barangays that make up the city and is known for its residential and industrial areas. The barangay is home to several major companies and warehouses, making it a significant economic hub in the area. Tunasan is also accessible via the South Luzon Expressway, making it a convenient location for businesses and residents alike. The area is predominantly urban and is surrounded by other major cities in Metro Manila.