Micah Gonzales, 15, went missing from Fairfield on Jan. 29, police said.
Gonzales is described as 5 feet 7 inches tall, about 135 pounds, with brown hair and green eyes.
Officers believe she may travel to Oakland or San Francisco, according to police.
Anyone with information on her whereabouts is encouraged to call Fairfield police at (707) 428-7368.
