Maryland has 450 records of mines listed by the United States Geological Survey (USGS).
- 450 USGS records of mines in Maryland.
- Iron , Chromium , Copper , Gold , and Silica mines located in Maryland. See All
by Total Mines
- Baltimore (103 Total Mines)
- Frederick (48 Total Mines)
- Anne Arundel (38 Total Mines)
- Harford (36 Total Mines)
- Carroll (35 Total Mines)
- Allegany (32 Total Mines)
- Montgomery (28 Total Mines)
- Washington (27 Total Mines)
- Baltimore City (26 Total Mines)
- Prince George's (26 Total Mines)
Historic Mining Records (USGS)
Maryland has 450 identified mines listed in The Diggings™. The most commonly listed primary commodities in Maryland mines are Iron , Chromium , and Copper . At the time these mines were surveyed, 7 mines in Maryland were observed to have ore mineralization in an outcrop, shallow pit, or isolated drill hole—known as an occurance mine.1 Maryland has 32 prospect mines.2 394 mines were in production at the time the data was entered into USGS records. Baltimore, Frederick, and Anne Arundel are the with the most mines.
Quick USGS Facts
- 450 records of mines in Maryland.
- 32 records of prospects
- 7 records of mineral occurrences of observable ore mineralization.
- 17 records of mining plants
- 394 records of mineral producers
Mines By County
1 Grade, tonnage, and extent of mineralization for such mines are unspecified.
2 Such mines have some degree of development such as surface trenching, adits, shafts, drill holes, geophysics, geochemistry, or geological mapping to estimate grade and tonnage.
Popular Public Lands & Regions
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Popular Towns, Cities, Etc.
Mining Claim News From The Diggings™
Learn more about the Bureau of Land Management, Public Land Survey System, and mining claims.
Understanding Claim Ownership
We receive lots of emails from people who find their name or a relative’s name on our site and want to know if this means they have some right to the land listed under that name.
Understanding BLM Administrative Areas
Whether it is filing a mine or researching one, the administering BLM office is going to be the definitive source.
Understanding Location Data
Mine handled by the Bureau of Land Management are not mapped by latitude and longitude, instead, these mines harken back to the Public Land Survey System.
A “township” can refer to two different things. Both are part of the PLSS measurement system but have different uses.