Marikina (/mərɪˈkɪnə/), officially the City of Marikina (Filipino: Lungsod ng Marikina), is a highly urbanized city in the National Capital Region of the Philippines. According to the 2024 census, it has a population of 471,323 people.

Located along the eastern border of Metro Manila, Marikina is the main gateway of Metro Manila to Rizal and Quezon through the Marikina–Infanta Highway. It is bordered on the west by Quezon City, to the south by Pasig and Cainta, to the north by San Mateo, and to the east by Antipolo, the capital of Rizal province.

The city was founded by the Jesuits on the fertile Marikina Valley in 1630 and the area was called Jesus dela Peña (Jesus of the Rocks) and later on called Mariquina. Marikina was the provincial capital of the Province of Manila under the First Philippine Republic from 1898 to 1899 during the Philippine Revolution. Following the onset of American occupation it was then organized as a municipality of Rizal Province, prior to the formation of Metro Manila in 1975. Formerly a rural settlement, Marikina is now primarily residential and industrial and has become increasingly commercial in recent years. The City of Marikina is considered one of the wealthiest local government units in the Philippines.

Marikina is known as the "Shoe Capital of the Philippines" owing to its famous shoe industry. It is the biggest manufacturer of shoes in the Philippines, producing almost 70% of shoes made in the country. Located in the city are the Philippine International Footwear Center and the Shoe Museum, housing the infamous shoe collection of former First Lady Imelda Marcos, wife of the late Filipino president, Ferdinand Marcos.

The city is under the jurisdiction of the Roman Catholic Diocese of Antipolo. It contains the Our Lady of the Abandoned Church, the oldest in the Marikina Valley, built in 1572.

In view of the non-existence of records or documents on how the name Marikina came into being, the following legends were gathered from elder residents of the different barrios in Marikina.

According to a local historian named Servando de los Angeles, the first settlers of Marikina are the descendants of Lakan Dula, known as the head of the ruling House of Dula and the pre-hispanic king of the Lakanate of Tondo. It happened when Lakan Dula sent his descendants to far away lands within sea and river routes. The riverbanks of Marikina were then settled by river dwellers or "taga-ilog", these natives were discovered by the Augustinians as they explored along the riverbanks during 1570's. Then during 1630's Jesuits arrived and there is when Christianity spread in Marikina, since the Jesuits have had the ecclesiastical control and supervision over the land.The Augustinians first to arrived at the valley in the late 16th century, at the spot known as Chorillo in Barangka. In 1572, Our Lady of the Abandoned Parish was established. Next came the Jesuits in 1630, in a place now called Jesús de la Peña (Jesus of the Rocks). Here, the Jesuits established a mission and built a chapel still known today as Jesús de la Pena Chapel. Fray Pedro de Arce, apostolic ruler of the Archbishop of Manila at that time, approved transfer of ecclesiastical control and supervision to the Jesuits, and settled the place as a town.

In 1665, an intensity 8 earthquake struck the valley and nearby Manila, and it is related to the activity now known as Marikina Valley Fault System. Only a Jesuit church experienced great damage and resulting in 19 deaths in the said earthquake.