|Region||National Capital Region|
|District||2nd District of San Juan|
|• Barangay captain||Alan T. Yam|
|• Total||2.08 km2 (0.80 sq mi)|
|• Density||7,313/km2 (18,940/sq mi)|
|Time zone||UTC+8 (PST)|
1502 (Greenhills North)
1503 (Greenhills PO)
Greenhills is an administrative division in eastern Metro Manila, the Philippines. It is an urban barangay in San Juan and is the largest barangay in the city, spanning over a third of San Juan City's total land area.
Centered on the Greenhills mixed-use development and its adjacent residential subdivisions, the barangay's borders are defined by the Ermitaño Creek bordering Barangays Addition Hills, Little Baguio, and Santa Lucia to the west and Barangays East Pasadeña and Corazon De Jesus to the northwest. It has land borders with Quezon City's Barangay Valencia to the northwest, Barangay West Crame to the northeast, Barangay Camp Aguinaldo to the east, and Mandaluyong City's Barangay Wack-Wack Greenhills East to the southeast.
The area that would become known as Greenhills was part of the Hacienda de Mandaluyon, the estate holdings of the Augustinian Order comprising of 4,033 hectares (40.33 km2) of sparsely inhabited rice fields and wild grasslands that now span the cities of San Juan, Mandaluyong, Quezon City, and Pasig.
The estate was sold to businessmen Dr. Frank W. Dudley and Don Francisco Ortigas, where the former sold his interest to Phil C. Whitaker, who with Ortigas founded the company Whitaker and Ortigas. The company would rename itself to Ortigas & Company, as it is known today. The company divided the land into subdivisions now known as Capitol, Wack-Wack, Greenhills, Valle Verde and Greenmeadows.  
A development to establish a residential community in the area started in the 1960s, centered around plans for schools, churches, and a centerpiece shopping complex. Plans for constructing what would become the Greenhills Shopping Center began in 1966 following years of studying planned communities in other countries. The new residential subdivision was named Greenhills, after the suburban Greenbelt community of Greenhills in the US state of Ohio. The growth of suburban residential subdivisions such as Greenhills in the 1960s is attributed to middle-class and upper-class populations seeking refuge from the busy, urban climate of Manila.
Greenhills as a residential subdivision covered 197 hectares (1.97 km2) of land, which would become divided further into distinct subdivisions known as North Greenhills, Greenhills West, and Greenhills East. When Connecticut Street opened up to traffic, the road divided the Greenhills East subdivision into Greenhills East and Northeast Greenhills, with the latter staying in Barangay Greenhills in San Juan City, while the former transferred to Mandaluyong City as part of Barangay Wack-Wack Greenhills East.
In 1972, Ortigas & Company set up the North Greenhills Association (NGA) as part of its plans to manage the namesake subdivision. From 1973 to 1976, the North Greenhills subdivision was home to the Greenhills Grand Prix, an international motor race that used the outlying streets of the subdivision and a part of Ortigas Avenue as its circuit track.
The six-lane Ortigas Avenue serves as a main thoroughfare for Greenhills, spanning the barangay from end to end, while the four-lane Boni Serrano Avenue (Santolan Road/Pinaglabanan Street) encircles the barangay's perimeter. The four-lane Wilson Street connects Ortigas Avenue to other adjacent barangays in San Juan City, as well as Mandaluyong City. The two-to-four lane Annapolis Street and Connecticut Street are access roads parallel to Ortigas Avenue, connecting the Greenhills Shopping Center to EDSA.
Painted bike lanes with bollards are also present along Ortigas Avenue and Boni Serrano Avenue, while unprotected painted bike lanes are present at Wilson Street, Annapolis Street, and the Greenhills Active Playground. The section of Ortigas Avenue within Greenhills also has motorcycle lanes next to its protected bike lanes within San Juan city limits.
Jeepney routes also provide intra and inter city transport along Annapolis Street, Wilson Street, and Ortigas Avenue, which brings passengers to and from the San Juan city proper and Ortigas Center.
Greenhills is served by the Santolan-Annapolis Station of the MRT Line 3. Bus Route 11 (Taytay-Gilmore) passes through the entirety of Ortigas Avenue and connects commuters to Gilmore Station of the LRT Line 2 and Ortigas Station of the MRT Line 3. Bus Route E (EDSA Carousel) also has stops at both MRT stations.
A roofed pedestrian alley between The Eisenhower Condominium and One Kennedy Place condominiums along Eisenhower Street also connects the Greenhills area to Road 11 in the adjacent Barangay West Crame.
The seat of government of Greenhills is located at Annapolis Wilshire Plaza along Annapolis Street, a 26-storey building constructed in 2013.
Barangay Greenhills is the second most-populated barangay in San Juan City, with a population of 15,212 people according to the 2020 census, up from a population of 14,114 people in the 2015 census. The earliest record of Barangay Greenhills in the official population census can be found on the 1975 census, the same year that San Juan City was transferred to Metro Manila from the province of Rizal.
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