Ortigas Center is a financial and central business district located at the boundaries of Pasig City, Mandaluyong City, and Quezon City in the Philippines. With an area of more than 100 hectares (250 acres), it is Metro Manila's second most important business district after Makati City. It is governed by Ortigas Center Association, Inc.
Ortigas Center is home to many shopping malls, office and condominium skyscrapers and other building complexes, and nightlife bars and restaurants. These include the St. Francis Square, the Asian Development Bank compound, the Oakwood Premier serviced apartments and a Shangri-La hotel. It is also the headquarters of San Miguel Corporation, Jollibee Foods Corporation, the Philippine branch of HSBC, and Robinsons Galleria. Also present in the area are Philippine offices of prominent engineering firms such as Parsons Brinckerhoff, Sinclair Knight Merz, and WSP Group. It also home to the Banco de Oro main office owned by mall taipan Henry Sy, Sr. SM Megamall, the third largest mall in the country after SM North EDSA and SM Mall of Asia, is also in the Center along EDSA, as is the The Medical City, one of the three hospitals in the country accredited by the Joint Commission on International Accreditation.
Ortigas Center began as the 4,033-hectare "Hacienda de Mandaloyon", an estate from the Augustinian Order. In the following years, there were several changes of partners. Then, on July 10, 1931, the company was incorporated “Ortigas, Madrigal y cia., S. en C.” as a limited partnership by shares (sociedad comanditaria por acciones). The parties to the partnership were Francisco Ortigas (Don Paco), Vicente Madrigal, B.C.M. Johnston, Fulgencio Borromeo, Clyde A. Dewitt and Manuel L. Quezon.
When Ortigas & Company acquired the estate, it was a virtual wasteland. The vision of the management, headed by Atty. Francisco Ortigas, Jr., who was President and Chairman at that time, turned it into a progressive industrial, commercial, and residential urban complex.
Prominent structures in Ortigas Center 
- Integrated Bar of the Philippines Building
- Parc Royale Condominium
- Tektite Building
- The Taipan Place
- One San Miguel Bldg.
- Pacific Center Bldg.
- UnionBank Plaza
- Orient Square Building
- St. Francis Shangri-La Place
- EDSA Shangrila Hotel
- Philippine Stock Exchange Towers (Tektite)
- Hanston Square Bldg.
- OMM-Citra Building
- Raffles Corporate Center
- Wynsum Corporate Tower
- Prestige Tower Building
- Tycoon Center
- Jollibee Plaza
- Cityland Plaza
- Strata 100
- Strata 2000
- Robinsons Equitable PCI Bank Tower
- One Corporate Centre
- Amberland Plaza
- 8137 Plaza
- Antel Global Corporate Center
- Discovery Suites
- OCAI Building
- JMT Corporate Condominium
- Benpres Building
- Medical Plaza Ortigas Building
- East of Galleria
- Goldland Millenia Tower
- Monroe Multinational Group, Inc.
- Times Core International Inc. (former company trainer, Jason Walker; new company trainer, Phillip Guangco)
- Startek International Ltd.
- Asian Development Bank
- SEAOIL Philippines, Inc.
- Parsons Brinckerhoff Philippines, Inc.
- Sinclair Knight Merz Philippines, Inc.
- WSP Philippines (Asia)
- Oakwood Premier Joy~Nostalg Center
- San Miguel Corporation
- Jollibee Foods Corporation
- Fujitsu Ten Solutions Philippines, Inc.
- Hewlett-Packard Philippines
- Chikka Asia, Inc.
- Ideal Minds Corporation
- Union Bank
- Energy Regulatory Commission
- Grupo Sorbetero
- Mega Publishing
- Summit Media
- Viva Entertainment
- Regal Entertainment
- INC Navigation Company Philippines Inc.
- Software Ventures International
- Pacific Internet, Philippines
- Star TV
- Sonshine Media Network International
- ZOE Broadcasting Network
- Fox International Channels (Philippines)
- Tsukiden Global Solutions, Inc (former Tsukiden Software Philippines, Inc.)
- Broadcast Enterprises and Affiliated Media, Inc.
- Ultrasonic Broadcasting System
- Health Plan Philippines, Inc.
- Our Lady of Peace - EDSA Shrine
- St. Francis of Assisi Church
- Greenhills Christian Fellowship
- Christ's Commission Fellowship St. Francis Square (Now a satellite church. CCF Main is now located at the new CCF Center in Frontera Verde, Tiendesitas)
- Victory Christian Fellowship
- Mu Gyung (Korean) Baptist Church
- Sumbogum Manila (Korean) Full Gospel Church
- Bread from Heaven Community Church
- Hope Christian Fellowship (BGC)
- River of God Church
- Ateneo de Manila University - School of Medicine and Public Health
- St. Paul College, Pasig
- University of Asia and the Pacific
- Saint Pedro Poveda College
- Lourdes School of Mandaluyong
- MFI Foundation Inc.
- AMA Computer College Pasig Campus
- DBSOFT Philippines INC.
- GlobalSky Communication
- TRG Philippines
- Trec Pacific
- Transcom Worldwide
- Sykes Enterprises
- Sterling Global Call Center
- Alorica Philippines, Inc.
- Pacific Hub
- Cyberbase Solutions Inc.
- A & E Global fusion
- Cziers Global Solutions Co.
- Ortigas & Company Limited Partnership - Ortigas & Company Limited Partnership Corporate Website