San Diego Source and Maps of World have maps of San Diego County, California, available on their websites. The maps show cities, major roads and landmarks located in the county.
The San Diego Geographic Information Source has an interactive map of San Diego County available on its website. This map allows users to search for parcel information by address or Assessor Parcel Number, and may show up to 20 attributes for each parcel. The map has three layers, including places, districts and ecology. The places layer includes hospitals, fire stations, libraries and ZIP codes. The districts layer shows school districts and political districts and the ecology layers shows floodplains, geology, soils and vegetation.