A system for categorizing geographic areas may include one or more processors and a memory. The one or more processors may receive a plurality of geographic locations each having been associated with one of a plurality of categories based at least in part on a plurality of user interactions. The one or more processors may associate a geographic area that encompasses the plurality of geographic locations with a category of the plurality of categories that has a highest commonality across the plurality of geographic locations. The one or more processors may receive an advertisement request that comprises an indication of one of the plurality of geographic locations that is encompassed by the geographic area, and provide an advertisement that is selected based at least in part on the category of the plurality of categories associated with the geographic area that encompasses the plurality of geographic locations.