Fareless Square was an area within central Portland, Oregon, where all rides on TriMet buses and light rail and the Portland Streetcar were free. It primarily consisted of the downtown area and, after 2001, the Lloyd District. It existed from January 1975 through August 2012, but was briefly renamed the Free Rail Zone in January 2010 after its coverage became limited to light rail and streetcar service, with bus rides no longer being free. The TriMet board decided in June 2012 to discontinue the Free Rail Zone primarily to help fill a large shortfall in the agency's budget, and the action was one component of a package of extensive budget cuts which also included service reductions and fare increases. The Free Rail Zone ended on August 31, 2012.
Fareless Square was similar to downtown fare-free (or free-ride) transit zones in Seattle (1973–2012), Pittsburgh (since 1985) and Salt Lake City (since 1985). The 2010 change that limited coverage to rail services made the fare-free zone more similar to one in Calgary, Alberta, which applies only to light rail.
The boundary of the westside portion of Fareless Square (and later the Free Rail Zone) started at the west foot of the Marquam Bridge, ran northwest along Interstate 405 to Northwest Irving Street, east to the Steel Bridge, then southward along the western shore of the Willamette River. The boundary of the eastside section, added in 2001, started at the east foot of the Steel Bridge, ran northwest to North Interstate Avenue to Multnomah Street, then east to the 1400 block of Northeast Multnomah Street, south to Northeast Holladay Street, and west to the Steel Bridge. By implication the entirety of the Steel Bridge was within the fare-free zone.
According to the TriMet code, the free-ride zone was "within Zone 1" and did not constitute a separate fare zone. TriMet discontinued all fare zones effective September 1, 2012, and no longer uses a zonal, or distance-based, fare system.