There is a critical need to understand groundwater behavior in urban environments. Urban groundwater management must go beyond general knowledge of the subsurface and focus on the hydraulic characterization of anthropogenic, heterogeneous deposits found in cities, and on the effects of subsurface structures. From a hydrogeological perspective, urban effects extend vertically into the subsurface, influenced by groundwater dynamics and infrastructure depth. Defining urban boundaries is essential for analyzing land-use changes and exploring spatial relationships with geographic features such as transportation networks, rivers, and landforms. Urban hydrogeology is part of urban studies and borrows knowledge from and interacts with geosciences, engineering, and urban planning. A brief history of urban hydrogeology and consideration of the boundaries of the discipline help us understand its problem domain. As there is an urgent need to expand and formalize educational pathways that prepare future professionals in sustainable urban groundwater management, urban hydrogeology must be developed as an interdisciplinary educational nexus, bridging hydrogeology and urban planning.