Santa Clarita, California is 2.3 times larger than Santa Maria, California.
Area: 60 km2 calculated
Santa Maria is a city on the Central Coast, in Santa Barbara County. It is approximately 120 miles northwest of Los Angeles. The 2012 population was 101,459, putting it ahead of Santa Barbara for the first time and making it the most populous city in the county. Wikipedia
Area: 139 km2 calculated
Santa Clarita, officially the City of Santa Clarita, is the third largest city in Los Angeles County, California, United States and the eighteenth largest city in the state of California, based on the population estimate from the California Department of Finance. Wikipedia