Bovine sera collected in Java and Bali in 1979 were subjected to serological tests for antibodies to 34 arthropod-borne or suspected arthropod-borne viruses. In hemagglutination-inhibition (HI) tests with alphaviruses, antibody to Getah virus was detected in one serum sample only while no sera revealed antibodies to Chickungunya and western equine encephalitis viruses. In HI tests with flaviviruses, Japanese encephalitis, Stratford, and Kokobera viruses were shown to be widely disseminated in Indonesian cattle. Of the bunyaviruses used in the tests, Aino, Akabane, Tinaroo, Peaton, Ilesha, Batai, Kairi, Kowanyama and Belmont viruses showed high incidences (≥ 30%) of neutralizing (NT) antibody. In NT tests with Orbiviruses, Ibaraki, Mitchell River, Warrego and bluetongue type l and type 20 viruses showed high antibody incidences (≥ 40%). NT antibody to bovine ephemeral fever virus was detected frequently (79%). These data indicated that many arthropod-borne viruses were widely disseminated among cattle in Indonesia.