Mines in Montgomery County, Maryland
56Total
12Active
| Mine | Commodity | Type | Status | Source |
|---|---|---|---|---|
| Amrize Rockville Quarry | Crushed, Broken Granite | Surface | Active | MSHA |
| Carderock Quarries | Crushed, Broken Stone NEC | Surface | Active | MSHA |
| B Giancola Quarry | Mica | Surface | Producer | MRDS |
| B. Giancola Quarry | Stone, Crushed/Broken | Producer | MRDS | |
| Rockville Crushed Stone | Stone, Crushed/Broken | Surface | Producer | MRDS |
| Rockville Crushed Stone Co. Quarry | Stone, Crushed/Broken | Producer | MRDS | |
| Stoneyhurst Quarry Number 1 | Stone, Dimension | Producer | MRDS | |
| Stoneyhurst Quarry Number 3 | Stone, Dimension | Producer | MRDS | |
| Stonyhurst Quarries | Stone | Surface | Producer | MRDS |
| Toms Run Quarry | Silica | Producer | MRDS | |
| Tri-state Stone Co. Quarry | Stone, Dimension | Surface | Producer | MRDS |
| Tri-state Stone Company Quarry | Stone, Dimension | Producer | MRDS | |
| Bethesda Mine | Gold | Past Producer | MRDS | |
| Bethesda Mine | Gold | Past Producer | MRDS | |
| Bethesda Mine | Gold | Past Producer | MRDS | |
| Bogley Mine | Gold | Past Producer | MRDS | |
| Bogley Mine | Gold | Underground | Past Producer | MRDS |
| Brookville Mine | Manganese | Surface | Past Producer | MRDS |
| Eagle Mine | Gold | Underground | Past Producer | MRDS |
| Earth Products Company Mines | Feldspar | Surface | Past Producer | MRDS |
| Earth Products Company Quarries | Feldspar | Surface | Past Producer | MRDS |
| Ellicott Mine | Gold | Past Producer | MRDS | |
| Etchison Mine | Underground | Past Producer | MRDS | |
| Etchison Mine & Lyde Griffith Property | Chromium | Past Producer | MRDS | |
| Ford Mine | Gold | Underground | Past Producer | MRDS |
| Gilmore Mine | Mica | Surface-Underground | Past Producer | MRDS |
| Griffith Mine | Underground | Past Producer | MRDS | |
| Harrison Mine | Gold | Past Producer | MRDS | |
| Harrison Mine | Gold | Past Producer | MRDS | |
| Huddleston Mine | Gold | Past Producer | MRDS | |
| Huddleston Mine | Gold | Underground | Past Producer | MRDS |
| Irma Mine | Gold | Past Producer | MRDS | |
| Lynch Mine | Gold | Past Producer | MRDS | |
| Lynch Mine | Gold | Past Producer | MRDS | |
| Maryland Mine | Gold | Past Producer | MRDS | |
| Maryland Mine | Gold | Past Producer | MRDS | |
| Mcceney Pit | Sand and Gravel, Construction | Surface | Past Producer | MRDS |
| Mcceney Pit And Plant | Sand and Gravel, Construction | Past Producer | MRDS | |
| Miller Mine | Gold | Underground | Past Producer | MRDS |
| Montgomery Mine | Gold | Past Producer | MRDS | |
| Montgomery Mine | Gold | Underground | Past Producer | MRDS |
| Rock Run Gold Placers | Gold | Occurrence | MRDS | |
| Rock Run Gold Placers | Gold | Placer | Past Producer | MRDS |
| Rockville Plant | Stone, Crushed/Broken | Processing Plant | Past Producer | MRDS |
| Sawyer Mine | Gold | Past Producer | MRDS | |
| Sawyer Mine | Gold | Past Producer | MRDS | |
| Sawyer Mine & 5 Additional Mines | Gold | Past Producer | MRDS | |
| Stoneyhurst Quarries, Inc. | Dimension Stone NEC | Surface | Abandoned | MSHA |
| Stoneyhurst Quarry Number 1 | Stone, Dimension | Surface | Past Producer | MRDS |
| Stoneyhurst Quarry Number 3 | Stone, Dimension | Surface | Past Producer | MRDS |
| Stonyhurst Quarries | Stone | Past Producer | MRDS | |
| Toms Run Quarry | Stone, Dimension | Surface | Past Producer | MRDS |
| Unnamed Schist Quarry | Stone, Dimension | Surface | Past Producer | MRDS |
| Unnamed Schist Quarry Near Cabin John Park | Stone, Dimension | Past Producer | MRDS | |
| Unnamed, Near Brookville | Manganese | Past Producer | MRDS | |
| Watson Mine | Gold | Underground | Past Producer | MRDS |