This study aimed to create a model for the sustainability of duck farming in Indonesia. Two hundred duck farmers in Brebes Regency were randomly selected as research respondents. Brebes is the duck production center of Indonesia. Approximately 80% of duck egg production originates in this area. The variables utilized include socioeconomic characteristics of duck farmers, social variables, age, education, medicinal seeds, feed, dried-cooked rice, trash fish, processing, business pattern, marketing, technology, and production; the endogenous variable was sustainability. Structural equation modeling (SEM) using TETRAD-IV software was employed to establish the analytical model. The results show that duck farming is sustainable regarding social, economic, and environmental aspects. Medical and technological factors significantly affect production. Social factors, egg processing, technology, and production significantly affect sustainability. To improve the sustainability of duck farming, it is necessary to increase the role of the farmer association, apply feed processing technology, diversify duck egg processing and boost technical efficiency in regard to increasing duck egg production. Focusing on these efforts will increase the sustainability of duck farming in Indonesia. Duck farming is sustainable based on a social perspective, economic analysis, and environmental viability.