City of Port Coquitlam. Port Coquitlam is a city in British Columbia, Canada. Located 27 km (17 mi) 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 city of Pitt Meadows lies across the Pitt River. Port Coquitlam is almost entirely bisected by Lougheed Highway. Port Coquitlam is often referred to as PoCo.. It is Canada's 88th largest city by population.