Portland, Oregon is 8% larger than Columbia, South Carolina.
Area: 348 km2 calculated
Population: 131,686 (2012)
Columbia is the state capital and largest city in the State of South Carolina. The population was 129,272 according to the 2010 census. The 2013 United States Census estimates put the city at 133,358. 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