Greenhills is an urban barangay in San Juan, Metro Manila, Philippines. It is the largest barangay in San Juan, covering a total area of 2.09 square kilometers and spanning over a third of San Juan's total land area. Centered and named after the Greenhills Shopping Center and its adjacent commercial establishments and gated communities, Barangay Greenhills is considered as a major commercial center of the city and of Metro Manila at large.