Geographic Regions and Area Codes

Area code 209 covers a significant portion of central California, including parts or all of several counties. The primary counties served by this area code are Amador, Calaveras, Mariposa, Merced, San Joaquin, Stanislaus, and Tuolumne. Additionally, it includes portions of Alameda, Alpine, El Dorado, Fresno, Madera, and Sacramento counties. Major cities within this area code include Stockton, Modesto, Tracy, Manteca, Lodi, Turlock, Merced, and Los Banos. Neighboring area codes include 442 and 760 (Oceanside), 530 (Redding), 279 and 916 (Sacramento), 559 and 831 (Fresno and Salinas), 925 (Concord), and 669 and 408 (San Jose).