Altai Territory or Altay Territory, administrative division (1995 pop. 2,697,200), c.102,400 sq mi (265,220 sq km), S central Siberian Russia. Barnaul is the capital. It is drained by the Upper Ob River and traversed by the TurkSib and South Siberian railroads. To the southeast is the Altai Republic, a former subdivision of the region. The fertile Kulunda steppe, where spring wheat, oats, corn, and sugar beets are grown, is in the western part of the territory. Major cities, besides Barnaul, include Biysk and Chesnokovka.