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Water basins characterise both physical and social environmental aspects such as land tenure. As such, the basins extend beyond spatial units of physical resources and human relations analysis to policy research and reform units. The comprehensive view of water basins in research goes along with an observed increase in anthropogenic-driven changes, such as land use and land cover changes, and cases of ineffective remedial measures to the adverse change, such as through applying integrated watershed management approaches. The human-induced land cover changes affect the water basin's biodiversity, for instance, contributing to an increase in zoonotic disease outbreaks like coronaviruses. The Lake Victoria basin exhibits similar patterns of change and effects due to, among other factors, land tenure, whose contribution is less known empirically. Therefore, this paper integrates satellite imagery and catchment survey data to examine the relationship between land tenure and land uses and land cover changes in the Lake Victoria basin of Eastern Africa. Additionally, explore the contextual character and role of three land tenure systems of Customary, Native freehold and Mailo found in the Uganda country segment of the basin in explaining the outcomes. The aim is to provide information that, among other benefits, improves water basin management and governance. The results indicate a statistically significant relationship exists between the perceived extent of land use and land cover change; drivers of change; the extent of adopting sustainable land-use practices, and the prevailing land tenure. Though with different tenure systems, the three case study water catchments experienced adverse land use and cover changes. The changes mainly affected land tenure indicative land use and cover classes, prominently on the Customary, Mailo, and Native freehold land tenure systems. However, marginal differences occur among the land tenure systems, as the systems feature both de jure and de facto systems and an orientation towards customary tenure characters. The situation likely explains the observed closeness in perceptions regarding the role and relationship between land tenure and land use and cover changes, tenure systems character, perceived drivers of change and eventual outcomes, including the sustainable land use practices adoption. In addition to explaining the land use and cover change, land tenure is an essential tool for restoration and sustainable basin development and sustainability. We, thus, recommend land tenure responsiveness in water basin management approaches for sustainable societal development. • Amounts of indigenous forest, open and closed woodland area between 80–95 % lost between 1985 and 2014. • Changes high on Customary, Mailo and Native freehold land tenure systems, respectively. • Land tenure systems titling differs among communities but is related in practice. • Land tenure and land use/ cover situation relationship significant at p = 0.000 < 0.05. • Land tenure plays a catalytic role against other land use and cover drivers. [ABSTRACT FROM AUTHOR]