To date, numerous empirical studies have been confirmed the key roles of knowledge sharing and organizational citizenship behaviors (OCBs) toward organizational performance. Thus, this study attempts to investigate determinants of knowledge sharing, and OCBs in government officials, which can improve organizational performance based on voluntary behaviors. Given this purpose of the study, the data collected from a sample of 250 government officials from An Nhon village, Binh Dinh Province,

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... am. This research adopts a cross-sectional study design and utilizes partial least square – structural equation modeling (PLS-SEM) technique through Smart-PLS software. The findings indicate that trust and team culture are determinants that positively and directly influences knowledge sharing and OCBs. This research contributes to the knowledge sharing and OCBs literature, and provides practical implications for public sectors. Managers should generate practices that help organizations enhance trust and team culture among officials, which lead to higher knowledge sharing and OCBs.