The new trends in supply chain and logistics have led to a new geography of warehousing in mega cities. This study is among the first to systematically and empirically explore the geography of warehousing, using the New York metropolitan region, one of the largest mega cities and the busiest freight hubs in the world, as the study area. Various spatial analyses were conducted to explore the spatial distribution patterns exhibited by the address-level establishment location data. The empirical results show three major characteristics of the geography, including: (1) clustered warehouses to take advantage of the economies of scale; (2) concentration of warehousing establishment in the main market of freight activities and end customers; and (3) proximity to transportation networks being a significant factor in affecting location decisions. Several policy implications were also suggested for warehousing and logistics oriented planning and decision making.