Scottsdale, Arizona is 5.6 times larger than Richmond, California.
Area: 86 km2 calculated
Population: 106,516 (2012)
Richmond is a city in western Contra Costa County, California, United States. The city was incorporated on August 7, 1905. Wikipedia
Area: 478 km2 calculated
Population: 223,514 (2012)
Scottsdale is a city in the eastern part of Maricopa County, Arizona, adjacent to the Greater Phoenix Area. According to the U.S. Census Bureau, as of 2010 the population of the city was 217,385. Wikipedia