Pasig, officially the City of Pasig (Filipino: Lungsod ng Pasig), is a 1st class highly urbanized city in the National Capital Region of the Philippines. According to the 2020 census, it has a population of 803,159 people. It is located along the eastern border of Metro Manila with Rizal province, the city shares its name with the Pasig River. A formerly rural settlement, Pasig is primarily residential and industrial, but has been becoming increasingly commercial in recent years, particularly after the construction of the Ortigas Center business district in its west. The city is home to the Roman Catholic Diocese of Pasig, based in Pasig Cathedral, a landmark built around the same time as the town's foundation in 1573.Pasig was formerly part of Rizal province before the formation of Metro Manila, the national capital region of the country. The seat of government of Rizal was hosted in Pasig at the old Rizal Provincial Capitol until a new capitol was opened in Antipolo, within Rizal's jurisdiction in 2009. However, it remained as the de jure, or official capital of the province until July 7, 2020. On June 19, 2020, President Rodrigo Duterte signed Republic Act No. 11475, which designated Antipolo as the official capital of Rizal.

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