North Las Vegas, Nevada is 35% larger than Olathe, Kansas.
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: 157 km2 calculated
Olathe is a city in and is the county seat of Johnson County, Kansas, United States. Located in northeastern Kansas, it is also the fourth most populous city in the state, with a population of 125,872 at the 2010 census. Olathe is the fourth-largest city in the Kansas City metropolitan area. Wikipedia