Los Angeles County, California is 50 times larger than North Las Vegas, Nevada.
Area: 10,580 km2 calculated
Los Angeles County, also known as L.A. County, officially the County of Los Angeles, is a county in the U.S. state of California. As of the 2010 U.S. Census, the county has a population of 9,818,605, making it the most populous county in the United States. Wikipedia
Area: 213 km2 calculated
North Las Vegas is a city in Clark County, Nevada, United States, located in the Las Vegas Valley. The city was incorporated on May 16, 1946. It is near the city of Las Vegas, and is the fourth largest city in the state of Nevada. Wikipedia