Port Coquitlam is a city in British Columbia, Canada. Located 27 km east of Vancouver, it sits at the confluence of the Fraser River and the Pitt River. Coquitlam borders it on the north, the Coquitlam River borders it on the west, and the cities of Maple Ridge and Pitt Meadows lie across the Pitt River. Port Coquitlam is almost entirely bisected by a Canadian Pacific Railway yard with two underpass crossings and one overpass. Port Coquitlam is often referred to as "PoCo." It is Canada's 88th largest city by population.

Port Coquitlam is not to be confused with the adjacent and larger Coquitlam.

The area was first inhabited by the Coast Salish people, including the Kwikwetl'em people. The first European settlers began farming beside the Pitt River in 1859. The Canadian Pacific Railway moved its terminus from Vancouver to the banks of the Fraser River in 1911. Port Coquitlam was first incorporated as a municipality on March 7, 1913. Port Coquitlam was originally mostly farmland; however, because of the densification and expansion of Vancouver, it has now become mostly suburban housing, especially on its northern and southwestern sides. The economy has diversified with a variety of industrial and commercial developments, including metal fabrication, high technology industries, and transportation.

Coquitlam ( /koʊˈkwɪtləm/) is a city in the Lower Mainland of British Columbia, Canada. Coquitlam is mainly a suburban city, and is one of the 21 municipalities comprising Metro Vancouver. According to the 2007 Canadian Census, it is the 5th-largest city in British Columbia. The current mayor of Coquitlam is Richard Stewart.

As of 2011, Coquitlam's population was 126,456.

The Coast Salish people were the first to live in this area, and archaeology confirms continuous occupation of the territory for at least 9,000 years. The name Kwikwetlem is said to be derived from a Coast Salish term meaning "red fish up the river".

Explorer Simon Fraser came through the region in 1808, and in the 1860s Europeans gradually started settling the area. Coquitlam began as a "place-in-between" with the construction of North Road in the mid-19th century to provide Royal Engineers in New Westminster access to the year-round port facilities in Port Moody.

The young municipality got its first boost in 1889 when Frank Ross and James McLaren opened what would become Fraser Mills, a $350,000, then state-of-the-art lumber mill on the north bank of the Fraser River. The District of Coquitlam was incorporated in 1891. By 1908, a mill town of 20 houses, a store, post office, hospital, office block, barber shop, and pool hall had grown around the mill. A mill manager's residence was built that would later become Place des Arts.