Santa Clarita's population growth rate outpaces county, state, and national averages. In 2019, Santa Clarita was ranked 20th out of 515 U.S. cities in population and economic growth, and was second among California cities. During the 2010 census, Santa Clarita was the fourth-largest city in Los Angeles County, however it has since surpassed Glendale as the county's third-largest city. It is the largest city in northern Los Angeles County. The city's median household income of $99,666 is higher than both statewide and national averages. ZIP code 91321 (Newhall) is the only ZIP code in the city with a median household income below the statewide average.