Barangay Oranbo is a small community located in the northern Pasig area. Trapezoid in shape, it is bounded on the North by the San Antonio Village, on the North East by Barrio Kapitolyo, on the South East by Barangay Pineda, on the South by Barangay Bagong Ilog, and on the West by Barangay Ugong.

Oranbo was once a sparsely populated, hilly portion in Ortigas.  It was only after the erection of the Rizal Provincial Capitol Building, on a 12-hectare piece of land donated by Ortigas and Company under the supervision of Engr. Mariano G. Bondoc, during the term of the former Rizal Governor, Dr. Sixto Antonio, that the place came to be known as one of the promising communities of Pasig. The barrio was then filled with a fair number of inhabitants, until the first residents finally requested that it be given a name.

 In 1953, a coined name ORANBO was given to the barrio in respect to the three people who made possible the acquisiton of the land. OR came from the first two letters of ORTIGAS, the donor of the land;  AN came from the  first two letters of ANTONIO, the Provincial Governor of Rizal at that time; and BO came from the first two letters of BONDOC, who supervised the transfer and subdivision of the area. 

Presently, as an independent community, Oranbo has its own barrio officials to look after its safety, peace, security, cleanliness, and beautification. The first Barangay Captain of Oranbo was CORNELIO T. PENEYRA, succeeded by IRENEO DIAS, then by ADELA JAVIER, and the late TIRSO PAAT. He was then followed by ONEZIMO JAVIER, then AVELINO PAGALUNAN and NATI T. DALINA. The present leader is RICHIE M. PUA.

(The information provided on this page was taken from this site.)