Patterson is a city in Stanislaus County, California, United States, located off Interstate 5. It is 27 miles southeast of Tracy and is part of the Modesto Metropolitan Statistical Area. Patterson is known as the "Apricot Capital of the World"; the town holds an annual Apricot Fiesta to celebrate with many drinks, food, desserts and games. The population was estimated to be 21,212 at the 2014 United States Census.