Tracy, city (1990 pop. 33,558), San Joaquin co., central Calif., in the San Joaquin valley; inc. 1910. It is a railroad junction in a cattle and dairying region. Grapes, sugar beets, grain, fruit, nuts, vegetables, and nursery products are grown, and there is food processing. Manufactures include furniture, chemicals, liquor, electronic equipment, and paper products. A pumping plant in Tracy is part of the Central Valley project.