Henderson, Nevada is 3.3 times larger than Richmond, California.
Area: 283 km2 calculated
Henderson, officially the City of Henderson, is a city in Clark County, Nevada. It is the second largest city in Nevada, after Las Vegas, with an estimated population of 265,679 in 2012. The city is part of the Las Vegas metropolitan area, which spans the entire Las Vegas Valley. Wikipedia
Area: 86 km2 calculated
Richmond is a city in western Contra Costa County, California, United States. The city was incorporated on August 7, 1905. Wikipedia