Nonmetallic Mineral Product Manufacturing in Maryland
NAICS 327 · MD
The register lists 197 facilities in Maryland. The Bureau of Labor Statistics counted 186 establishments in Maryland in 2025. Schuster Ready Mix, LLC, located in Owings Mills, employed 427 people in 2025.
SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE
Map, cities and product lines
Plants in Maryland127 FACILITIES
Listing 127 of 197: the facilities with a website, a size band or two sources on record. The rest are in site search.
| Facility | City | Employees | Status |
|---|---|---|---|
| Wicomico County Airport | Salisbury | — | UNVERIFIED |
| Wienerberger Group (general Shale) | Beltsville | — | UNVERIFIED |
| York Building Products - Cockeysville | Cockeysville | — | UNVERIFIED |
| American Insulated Glass LLC - Baltimore | Ijamsville | 20–99 | REPORTED CLOSED |
| Bay Ready Mix of Maryland Llc | Baltimore | 20–99 | LIKELY ACTIVE |
| Bryantown Plant | Waldorf | 20–99 | LIKELY ACTIVE |
| Crofton | Crofton | 20–99 | LIKELY ACTIVE |
| C.R. Semler Inc | Smithsburg, Md | 20–99 | LIKELY ACTIVE |
| Gillespie Precast - Plant 2 | Chestertown | 100–499 | LIKELY ACTIVE |
| Gold Bond Building Products - Baltimore | Baltimore | 100–499 | LIKELY ACTIVE |
| Lexington Park Plant | Lexington Park | 1–19 | LIKELY ACTIVE |
| Maryland Laurel Gorman Road | Laurel | 20–99 | LIKELY ACTIVE |
| MR Stone, LLC | Monrovia | 20–99 | LIKELY ACTIVE |
| ODL - Hagerstown, MD | Hagerstown | 1–19 | LIKELY ACTIVE |
| Powercon South | Odenton | 20–99 | LIKELY ACTIVE |
| Proform Finishing Products - Belcamp | Belcamp | 20–99 | LIKELY ACTIVE |
| Rocky Ridge Plant | Rocky Ridge | 20–99 | LIKELY ACTIVE |
| Schuster Ready Mix, LLC | Owings Mills | 100–499 | LIKELY ACTIVE |
| United Plate Glass Company (Frederick) | Frederick | 1–19 | LIKELY ACTIVE |
| Williamsport | Williamsport | 20–99 | LIKELY ACTIVE |
| Advent Industries LLC T a Mt Savage Firebrick | Frostburg | 20–99 | UNVERIFIED |
| Atlantic Imprints, Inc. | Baltimore | 20–99 | UNVERIFIED |
| Claddagh Pottery, Inc. | Annapolis | 1–19 | UNVERIFIED |
| Cumberland Concrete Corporation | Lavale | 1–19 | UNVERIFIED |
| Granix INC | Laurel | 1–19 | UNVERIFIED |
| Maryland Style Marble & Granite, INC | Edgewater | 1–19 | UNVERIFIED |
| Tgc Corporation | Millington | 1–19 | UNVERIFIED |
All nonmetallic mineral product manufacturing nationwide · All manufacturing in Maryland