Old Maps of Potomac, Maryland for Metal Detecting
Plan your next treasure hunt with 17 historic maps of Potomac. Find old homesites, ghost towns, trails, and gathering spots that may be lost to time — perfect for identifying promising metal detecting locations.
- Locate forgotten sites: Uncover places like long-lost settlements, abandoned rail lines, or gathering spots.
- Plan better hunts: Use map overlays combined with LiDAR or satellite views to narrow in on historically rich areas.
- Made for detectorists: Thousands of hobbyists use these maps to discover relics, coins, and hidden history.
Use these historic maps to boost your research and find new opportunities beneath the surface of Potomac.
Potomac, MD maps
(17)- 1893 Map of Frederick
1893 Frederick1893 Print · USGSMaryland's Piedmont region at the end of the nineteenth century reveals a landscape defined by the Potomac River and the rise of rail transit. Researchers can trace the path of the Chesapeake and Ohio Canal or locate local hubs like Poolesville and Buckeystown. - 1894 Map of Frederick
1894 Frederick1894 Print · USGSMaryland's Piedmont region in the late nineteenth century was a complex network of river crossings and railway junctions. Researchers can trace the path of the Baltimore & Ohio R. R. past Sugar Loaf Mtn. and locate historic river sites like Nolands Ferry.5 unique versions available - 1908 Map of Rockville
1908 Rockville1908 Print · USGSMontgomery County was a rural landscape of crossroads and rail towns in the early twentieth century. Genealogists and historians can trace the paths of the Metropolitan Branch and early transit lines like the Georgetown and Rockville Electric Road through towns such as Rockville and Washington Grove.3 unique versions available - 1923 Map of Rockville
1923 Rockville1923 Print · USGSMontgomery County was a landscape of rail-linked towns and river valleys in the early twentieth century. Genealogists and historians can trace the foundations of Rockville or search for family-named landmarks like Mt Zion and the path of the Chesapeake and Ohio Canal.4 unique versions available - 1944 Map of Rockville, 1955 Print
1944 Rockville1955 Print · USGSCentral Montgomery County is captured here in the mid-1940s as rural agriculture begins to meet suburban growth along the Baltimore and Ohio RR. Genealogists can locate family names at Beall Cem or trace rural settlements like Quince Orchard and Sunshine. - 1945 Map of Rockville
1945 Rockville1945 Print · USGSMontgomery County in the mid-1940s reveals a landscape of growing towns and riverfront heritage. Genealogists and historians can trace the foundations of Rockville, the operations at Congressional Airport, and the quiet reaches of the Chesapeake and Ohio Canal (Abandoned).2 unique versions available - 1948 Map of Baltimore
1948 Baltimore1948 Print · USGSMaryland and Pennsylvania crossroads are captured in the late 1940s, showing a landscape defined by historic rail lines and major military installations. Genealogists can trace family connections in Gettysburg, Westminster, and near the U.S. Naval Academy in Annapolis.2 unique versions available - 1951 Map of Rockville
1951 Rockville1951 Print · USGSMontgomery County was in the midst of a postwar transition during the early fifties, balancing its rural roots with new suburban growth. Genealogists and historians can trace family landmarks like Scotland Sch, the Congressional Airport, and the Bells Mill site.2 unique versions available - 1954 Map of Baltimore
1954 Baltimore1954 Print · USGSThe Mid-Atlantic region in the early fifties shows a landscape of growing suburban centers and heavy rail corridors. Trace mid-century transit networks and military landmarks from the Aberdeen Proving Ground to the Gettysburg National Military Park. - 1956 Map of Baltimore
1956 Baltimore1956 Print · USGSMid-century Maryland and Pennsylvania are captured here during a period of massive suburban and military growth across the Chesapeake region. Genealogists and historians can trace the rail corridors of the Baltimore & Ohio RR and locate landmarks like Fort McHenry or the Aberdeen Proving Ground. - 1956 Map of Rockville, 1958 Print
1956 Rockville1958 Print · USGSMid-century Rockville and the surrounding Maryland countryside are captured here during a period of rapid suburbanization and civic growth. Genealogists and local researchers can trace family landmarks and schools including Lincoln Jr High Sch, the historic Scotland community, and the Congressional Airport.2 unique versions available - 1957 Map of Baltimore, 1964 Print
1957 Baltimore1964 Print · USGSMaryland and Southern Pennsylvania are shown during the mid-century expansion of the Baltimore-Washington corridor. Researchers can trace the extensive rail lines of the Baltimore & Ohio RR and locate sites like Fort Detrick and Gettysburg National Military Park.5 unique versions available - 1961 Map of Baltimore
1961 Baltimore1961 Print · USGSMaryland and Pennsylvania are captured at a mid-century peak of industrial and military expansion. Genealogists and historians can trace rail corridors like the Western Maryland Ry or locate regional landmarks such as Camp Detrick and Kent Island. - 1965 Map of Rockville, 1966 Print
1965 Rockville1966 Print · USGSMid-century Montgomery County is captured during its suburban boom, showing the transition from agricultural tracts to sprawling residential neighborhoods. Researchers can trace family roots through numerous schools and churches like Lincoln Park Sch or locate the historic Chesapeake and Ohio Canal and the Shady Grove Music Fair.5 unique versions available - 1984 Map of Frederick, 1985 Print
1984 Frederick1985 Print · USGSMaryland's Piedmont and the Potomac River valley are shown here in the mid-eighties as suburban growth began to meet historic rural landscapes. Genealogists and historians can trace the paths of the Baltimore and Ohio RR or locate the boundaries of Antietam National Battlefield and Fort Detrick. - 1989 Map of Baltimore
1989 Baltimore1989 Print · USGSThe Mid-Atlantic corridor in the late eighties is captured here, from the Baltimore harbor to the Blue Ridge foothills. Researchers can trace the sprawling footprints of Aberdeen Proving Ground, the historic grounds of Gettysburg National Military Park, and the winding Susquehanna River. - 2023 Map of Rockville, 2023 Print
2023 Rockville2023 Print · USGSThe suburban landscape between Rockville and Gaithersburg is captured here in detail. Researchers can trace the Chesapeake and Ohio Canal or locate local landmarks like Saint Gabriel Cem and Rockland.
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