DUCKS LAYER FARM CONTRIBUTION ON HOUSEHOLDS INCOME IN EAST LANGOWAN DISTRICT. The purpose of this research was to evaluate duck layer farm contribution on household domestic income in East Langowan district. This study was conducted on October 1st to 28th, 2018. The data were obtained by applyingsurvey methods and interviews completed the questionnaires. Samples were taken by purposive sampling methods involving 100 adult ducks maintained traditionally. The samples number is obtained from the whole household farmers, divided into 3 scales of livestock ownership. Scale 1 was farmers with 100 to 233 duck earning revenue of IDR 29.175.786 per year. Scale 2 was farmers with 234 to 367 ducks earning revenue of IDR 52.685.974 per year. Scale 3 was farmers with 368 to 500 ducks earning revenues of IDR 72.364.195 per year. Generally, the duck farm in East Langowan district was still traditionally maintained under a semi-intensive maintenance system. The household farmers of the laying ducks contributed the highest income of 89% with a value of IDR 154.225.952 per year. Animal farm of other owners (off farm) contributed 1% with the value of IDR 2.304.678 per year. Sources of non farming contributed 10% with the value of IDR 17.441.667 per year. It can be concluded that duck farm was categorized into a major farming industry providing greater revenues than other businesses. Duck farm was a source of household farmer income contributing 85% compared with other businesses. The greater the scale of the livestock ownership, the greater the income will be received. The laying duck maintenance system in East Langowan district was still categorized in a traditional system, important to be developed because of potential of agricultural land can provide natural feed so as to profitable breeders.