San Antonio currently boasts an unemployment rate of 3.5%, which is the 10th lowest in the U.S. Business costs in the San Antonio MSA are 20% below the national average, translating to forecasted employment growth of 2% annually through 2021 San Antonio was ranked #1 in population growth in 2017, according to the U.S. Census Bureau In 2015, San Antonio was the nation's fastest growing economy with $108.8 billion in GDP and an average year the growth rate of 5.5% over the last decade San Antonio is the third largest metro in Texas and the 25th largest metro in the U.S.