Portland, Oregon is 2.9 times larger than Boston.
Area: 129 km2 calculated
Population: 636,479 (2012)
Boston is the capital and largest city of the Commonwealth of Massachusetts in the United States. Boston also serves as county seat of Suffolk County. Wikipedia
Area: 376 km2 calculated
Population: 603,106 (2012)
Portland is the largest city by population in the U.S. state of Oregon, near the confluence of the Willamette and Columbia rivers. Wikipedia