Cajatambo, or Caxatambo, a town and province of the department of Ancachs, Peru, on the western slope of the Andes. Since 1896 the population of the town has been estimated at 6000, but probably it does not exceed 4500. The town is 110 m. N. by E. of Lima, in lat. 9° 53′ S., long. 76° 57′ W. The principal industries of the province are the raising of cattle and sheep, and the cultivation of cereals. Cochineal is a product of this region. Near the town there are silver mines, in which a part of its population is employed.