Bacs, Or Bacska, a county in southern Hungary, surrounded on three sides by the Danube land Theiss; area, 3,972 sq. m.; pop. in 1870. 3576,149. The county is mostly level, and, with the exception of a few barren tracts, is noted for its great fertility and splendid pastures. It produces wheat of the best quality, wine, tobacco, and fine cattle and horses. The interior is traversed by the Francis canal, near which Zombor, the capital, is situated. Other important towns are Szabadka or Maria-Theresiopel, on the railroad uniting Zombor with Szegedin, and Neusatz, on the Danube. The population consists chiefly of Magyars, Germans, and Rascians or Serbs. Shortly after the outbreak of the Hungarian revolution in 1848, the county became the principal seat of the Serb rising against the Magyars, and for more than a year witnessed all the horrors of a war of races. After the war it formed with the Banat the Serb waywodeship (Voivodina), but has since been restored to its former status. - Baes, a town in the S. W. part of the county, is situated on a small tributary of the Danube; pop. in1870, 3,666.