We are working at building a website for each Maryland County with resources and data to assist you in your research. Click on the County name to the left to access our resources. You may discover that a county is in need of a County Team Associate. If you'd like to join us in making resources freely available Click Here. If you've got some date that you'd be willing to share, please contact us.
| County | Established | Parent County(s) |
County Team Associate |
| Allegany County | 1789 | Washington | Lila Baier |
| Anne Arundel County | 1650 | Original County | Adopt Me! |
| Baltimore City | 1729 | Baltimore County | Adopt Me! |
| Baltimore County | 1659 | Original County | Adopt Me! |
| Calvert County | 1654 | Original County (formerly Patuxent) | Adopt Me! |
| Caroline County | 1773 | Dorchester and Queen Anne's | Adopt Me! |
| Carroll County | 1837 | Baltimore and Frederick | Deborah Nagy |
| Cecil County | 1674 | Baltimore and Kent | Adopt Me! |
| Charles County | 1658 | Original County | Adopt Me! |
| Dorchester County | 1668 | Original County | Adopt Me! |
| Frederick County | 1748 | Prince George's | Deborah Nagy |
| Garrett County | 1872 | Allegany | Adopt Me! |
| Harford County | 1773 | Baltimore | Adopt Me! |
| Howard County | 1851 | Anne Arundel and Baltimore | Adopt Me! |
| Kent County | 1642 | Original County | Adopt Me! |
| Montgomery County | 1776 | Frederick | Adopt Me! |
| Prince George's County | 1695 | Charles and Calvert | Adopt Me! |
| Queen Anne's County | 1706 | Talbot | Adopt Me! |
| St. Mary's County | 1637 | Original County | Adopt Me! |
| Somerset County | 1666 | Original County | Adopt Me! |
| Talbot County | 1662 | Kent | Adopt Me! |
| Washington County | 1776 | Frederick | Adopt Me! |
| Wicomico County | 1867 | Somerset and Worcester | Adopt Me! |
| Worcester County | 1742 | Somerset | Adopt Me! |