Quezon City, also known as the City of Quezon and Q.C., is the richest and most populous city in the Philippines. According to the 2020 cen…Quezon City, also known as the City of Quezon and Q.C., is the richest and most populous city in the Philippines. According to the 2020 census, it has a population of 2,960,048 people. It was founded on October 12, 1939, and was named after Manuel L. Quezon, the second president of the Philippines. Quezon City served as the capital of the Philippines from 1948 until 1976, when the designation was returned to Manila.