Geographic Information Systems (GIS)

Online Mapping:

The Full St Marys County GIS Map allows full access to the counties public GIS layers. Search for addresses or parcels. View current and historic aerial imagery. See Zoning, Land Use, and Floodplain coverage.

St. Mary's County GIS Map

Compare the existing and newly proposed Critical Area lines and learn more about what the change may mean for you.

Proposed Critical Area

Critical Area Update Project

GIS data is provided 'as is'. The maps and data provided are provided for illustration purposes only, and are not suitable for site-specific decision making. St. Mary's County specifically disclaims any warranty, either expressed or implied, including, but not limited to, the implied warranties of merchantability and fitness for a particular use. The entire risk as to quality and performance is with the user of the data. In no event will St. Mary's County or its staff be liable for any direct, indirect, incidental, special, consequential, or other damages, including loss of profit, arising out of the use of these data even if St. Mary's County has been advised of the possibility of such damages.

Downloadable Layers

Arc-Explorer is a free download from ESRI that will view our downloadable files

Map Changes, Updates, and Ordering Information

Your feedback is very important! If you find any Mapping Applications not functioning properly, please contact St. Mary's County at our feedback page to inform us of any problems. To order additional GIS data.