Ortigas Avenue is a 12.1 km (7.5 mi) highway running from eastern Metro Manila to western Rizal in the Philippines. It is one of the busiest highways in Metro Manila, serving as the main thoroughfare of the metro's east–west corridor, catering mainly to the traffic to and from Rizal.

Quick Facts R-5, Route information ...

R-5 Ortigas Avenue
Looking west towards Ortigas Center from IPI
Route information
Maintained by Department of Public Works and Highways
Length	12.1 km (7.5 mi) Including extension from Pasig to Taytay
Component highways	R-5 R-5 from Quezon City to Pasig N60 from Quezon City to Taytay N184 in San Juan and Mandaluyong
Major junctions
West end	N184 (Bonny Serrano Avenue) at the Quezon City–San Juan boundary
Major intersections	AH 26 (N1) (Epifanio de los Santos Avenue) N11 (Circumferential Road 5) N601 (Bonifacio Avenue) / Felix Avenue
East end	N60 (Corazon C. Aquino Avenue) / Taytay Diversion Road / L. Wood Street in Taytay
Location
Country	Philippines
Regions	Metro Manila, Calabarzon
Provinces	Rizal
Major cities	San Juan, Mandaluyong, Quezon City, Pasig
Towns	Cainta, Taytay
Highway system
Roads in the Philippines Highways Expressways List

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The western terminus of the highway is at the boundary of San Juan and Quezon City. The highway then traverses through Ortigas Center and along the cities of Mandaluyong, Quezon City, and Pasig, followed by the municipality of Cainta, and finally ending in the municipality of Taytay.

The portion of Ortigas Avenue from EDSA–Ortigas Interchange, Quezon City to the Buli Bridge at the Pasig–Cainta boundary is designated as Radial Road 5 (R-5).^[1] The highway is also designated as National Route 60 (N60) and National Route 184 (N184) of the Philippine highway network, respectively.

The highway is named after Filipino lawyer and businessman Don Francisco Emilio Barcinas Ortigas Sr. (1875–1935), who was popularly known as "Don Paco", or simply as Francisco Ortigas. Ortigas is known for establishing a partnership between him and several businessmen (now Ortigas & Company) to purchase the 4,033 hectares (40.33 km²) Hacienda de Mandaluyon from the Augustinian Order in 1931, which now spans the cities of San Juan, Mandaluyong, Pasig, and Quezon City.^[2][3][4]

Ortigas Avenue cuts eastwards from the city boundary of San Juan and Quezon City in Metro Manila to Antipolo in Rizal, passing through residential, industrial, and commercial areas, including Ortigas Center, its namesake central business district. Its section from Bonny Serrano Avenue to EDSA forms part of National Route 184 (N184), a secondary national road under the Philippine highway network. Meanwhile, the rest of the route east of EDSA forms part of National Route 60 (N60), a primary national road. Eastwards past the C5–Ortigas Interchange in Pasig, the avenue is called Ortigas Avenue Extension. Its section from Dr. Sixto Antonio Avenue in Pasig to Felix Avenue at the Cainta Junction is officially known as Pasig–Cainta Road and forms part of the Manila East Road. From Cainta Junction to Kaytikling Rotunda in Taytay, it is alternatively known as Cainta-Kayticling-Antipolo-Teresa-Morong Road.

Ortigas Avenue starts as a physical continuation of Granada Street past Bonny Serrano Avenue at the boundary of San Juan and Quezon City. It then cuts through Greenhills, San Juan and northeast of Wack Wack Golf and Country Club in Mandaluyong. It crosses EDSA at the EDSA–Ortigas Interchange at the boundary of Mandaluyong and Quezon City, making the highway goes back to Quezon City after it goes far away from San Juan-Quezon City border in Bonny Serrano Street, and runs through Ortigas Center, making a slight curve on Meralco Avenue. The avenue soon cuts through Ugong, enters Pasig, and crosses Circumferential Road 5 at the C5–Ortigas Interchange where the Bridgetowne is located. It soon crosses Marikina River and Manggahan Floodway which enters the barangay of Rosario, still in Pasig. The avenue partially becomes a single carriageway and changing back into a dual carriageway, and then enters the province of Rizal at Cainta, past SM City East Ortigas (formerly Ever Gotesco Ortigas).

It crosses Bonifacio and Felix Avenues at Cainta Junction. It then continues to Taytay and passes over the Kaytikling Rotunda with Taytay Diversion Road in Taytay, Rizal before continuing as Manila East Road.