Thornton, California Area Code

Thornton, CA Area Codes are

209 and 350

Thornton, CA is officially utilizing two area codes which are area codes 209 and 350.

In addition to Thornton, CA area code information read more about area code 209, area code 350, and California area codes.

Thornton, CA is located in San Joaquin County and observes the Pacific Time Zone. View our Times by Area Code tool.

California Area Code Map