Austin, Texas is 16 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: 933 km2 calculated
Austin is the capital of Texas and the seat of Travis County. Located in Central Texas and the American Southwest, it is the 11th-most populous city in the United States of America and the fourth-most populous city in the state of Texas. Wikipedia