North Las Vegas, Nevada is 3.4 times larger than Pomona, California.
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
Area: 63 km2 calculated
Pomona is the fifth largest city in Los Angeles County, California. Pomona is located in between the Inland Empire and the San Gabriel Valley. As of the 2010 United States Census, the city's population was 149,058. Wikipedia