The Chesapeake Bay Watershed, the largest estuary in the United States, spans 62,000 square miles and includes six states and the District of Columbia. A stewardship agreement exists among the three primary states; Maryland, Virginia, and Pennsylvania that calls for a commitment to implement regulation and uphold practices that maintain or improve the Bay’s ecosystem as a whole. To meet these and other coastal challenges Virginia and Maryland have independently developed Internet based products through which data, maps, and information are served. This chapter will summarize some of the highlights of each state’s coastal web atlas. The type and format of resources available through each site will be reviewed. The user community will be defined. And a brief description of the site management structure will be presented. Both efforts have been spear- headed and supported by the states’ Coastal Zone Management Program, a program within the National Oceanic and Atmospheric Administration (NOAA).