Systems, methods, and computer-readable media are described for a geographic boundary determination service. A geographic boundary may be associated with one of a plurality of geographic locations, and the area within the geographic boundary may be within a specified distance of the geographic location and closer to the geographic location than to any other geographic location in the plurality of geographic locations. The geographic boundary determination service may determine geographic boundaries for existing locations or may determine a set of locations whose geographic boundaries satisfy various criteria. The geographic boundary determination service may further display geographic maps that include the geographic boundaries, demographic indices and other demographic information relating to the geographic boundaries, network coverage information relating to the geographic boundaries, and a targeted geographic region or regions that the boundaries overlap.