The Portland Streetcar is a streetcar system in Portland, Oregon, that opened in 2001 and serves areas surrounding downtown Portland. The 3.9-mile (6.3 km) NS Line runs from Northwest Portland to the South Waterfront via Downtown and the Pearl District. The Loop Service, which opened in September 2012 as the Central Loop, runs from Downtown to the Oregon Museum of Science and Industry via the Pearl District, the Broadway Bridge across Willamette River, the Lloyd District, and the Central Eastside Industrial District and added 3.3 miles (5.3 km) of route. In September 2015 the line was renamed as the Loop Service, with the A Loop traveling clockwise, and the B Loop traveling counterclockwise. The two-route system serves some 20,000 daily riders.

Downtown Portland is the central business district of Portland, Oregon, United States. It is on the west bank of the Willamette River in the northeastern corner of the southwest section of the city and where most of the city's high-rise buildings are found.