Calvert County GISA countywide address layer for Calvert County, Maryland. This data set depicts countywide address data for Calvert County, Maryland. The data are maintained by the Departments of Public Safety and Technology Services on a regular basis.ArcGIS FeatureLayerhttps://hub.arcgis.com/datasets/c2332aa2febb4a3b9bf688b55ab10ae1_2engCalvert County Open GIS Data PortalPublicAddresses [Maryland--Calvert County]Web servicesMaryland--Calvert CountyMarylandLast Modified: 2025-03-27