Industrial oil palm plantations threaten biodiversity in Southeast Asia, yet some native species are highly adaptable within these environments. Our study investigates the space use of leopard cats (Prionailurus javanensis) within oil palm plantations adjacent to degraded forest fragments in the Kinabatangan floodplain, Sabah, Malaysian Borneo. From March to September 2020, we captured and collared four male cats with GPS collars, accumulating a total of 13,206 successful locational points. We estimated the home ranges using the Minimum Convex Polygon (MCP) and adaptative Localised Convex Hull (a-LoCoH) methods. The average home ranges were 8.60 km² ± 1.98 (± SD) [95% MCP] and 5.39 km² ± 1.23 [95% a-LoCoH], with corresponding core areas of 2.55 km² ± 0.99 (± SD) [50% MCP] and 1.05 km² ± 0.30 [50% a-LoCoH]. The home ranges of male leopard cats overlapped (7% to 28%), while core areas remained exclusive. Despite significant variations in individual habitat use, these cats were detected more frequently in oil palm habitat, occupying 80.89% of their home range and 78.38% of core area. Interestingly, they relied more on buffer zones contiguous to plantation area rather than adjacent secondary forests, highlighting the importance of preserving High Conservation Value (HCV) forests.