Quezon City is the largest city in Metro Manila. At approximately 160 square kilometers, it covers almost one-fourth of the area of Metro Manila. The city lies on a relatively high plateau on the northeast corner of the metropolis between the lowlands of Manila to the southwest and the Marikina River valley to the east. The southern portion is drained by the very narrow San Juan River and its tributaries to Pasig River, while running in the northern portions of the city is the equally narrow Tullahan River.
Quezon City is bordered by Manila to the southwest, by Caloocan City and Valenzuela City to the west and northwest. To the south lies San Juan and Mandaluyong City while Marikina City and Pasig City borders Quezon City to the southeast. To the north across Marilao River lies San Jose del Monte City in the province of Bulacan and to the east lies Rodriguez and San Mateo, both in the province of Rizal.