Wetlands have key hydrological roles within watersheds through flow regulation and water storage. Yet, assessing their hydrological connectivity remains challenging due to cartographic dataset limitations. This study aims (1) to identify typical geological, topographical, and hydrological conditions that characterize wetland connectivity to groundwater and surface water in southern Quebec, and (2) to evaluate existing cartographic databases. The methodology relies on an integrated GIS framework combining open‑access datasets with varying spatial resolutions, including geological maps, hydrographic networks (GRHQ and LiDAR‑derived), and wetland inventories (potential and detailed). This approach estimates interactions between wetlands and surface hydrographic features and assesses potential connections with contact aquifers. In the Becancour River hydrological unit, the use of the LiDAR‑derived hydrographic network decreases the number of disconnected wetlands by 32% compared to the GRHQ dataset. This highlights the importance of hydrographic network resolution for identifying small and intermittent streams that significantly influence hydrological connectivity. Results also show that small wetlands (<1 ha) are more frequently disconnected from the surface network, emphasizing wetland size as a key determinant of hydrological isolation. Also, disconnection patterns show no clear relationship with topographic position. For example, only 6% of wetlands located between 100 and 200 m are isolated from permeable geological formations, whereas wetlands situated at lower or higher elevations exhibit even lower disconnection rates (0- 4%), suggesting that elevation exerts limited control on hydrogeological connectivity. Overall, this study provides new insights into wetland hydrological connectivity and represents a step toward developing province‑wide mapping to support future conservation and management efforts.