Sign manufacturers in Maryland
Maryland has 18 sign makers in EPA records, facilities that list codes for signs and advertising displays. The most are in Baltimore, Beltsville and Frederick. That is 5% of the 359 such facilities nationwide, and Maryland ranks #4 of 42 states.
- Product
- Sign manufacturers
- Facilities
- 18
- State rank
- #4
- NAICS
- 339950
- Revised
- November 1, 2026
Facilities in Maryland
These are active facilities in EPA's ECHO database that list a code for signs and advertising displays.
| Facility | City | What EPA lists |
|---|---|---|
| Environmental Sign Systems | Queenstown | Sign Manufacturing |
| A & A Signs | Baltimore | Sign Manufacturing |
| Baltimore Sign | Baltimore | Sign Manufacturing |
| Belsinger Sign Works | Baltimore | Sign Manufacturing |
| D M S Sign Connection Inc | Mount Airy | Sign Manufacturing |
| Duff Signs | Beltsville | Sign Manufacturing |
| Exhibit Aids | Beltsville | Sign Manufacturing |
| G S Images | Hagerstown | Sign Manufacturing |
| Graphcom Frederick | Frederick | Sign Manufacturing |
| H&m Signs, Inc. | Linthicum | Sign Manufacturing |
| Hallmark Engraving, LLC | Accident | Sign Manufacturing |
| Hargrove Inc | Lanham | Sign Manufacturing |
| Jack Stone Sign Company | Landover | Sign Manufacturing |
| Park Sign Company | Baltimore | Sign Manufacturing |
| Signs By Tomorrow | Middle River | Sign Manufacturing |
| Smi Sign Systems DBA Modulex Mid-Atlantic | Frederick | Sign Manufacturing |
| Triangle Sign & Service | Baltimore | Sign Manufacturing |
| Triangle Sign & Service | Halethorpe | Sign Manufacturing |
Industry codes are reported by facilities to EPA programs and are not checked here. A few listings may be repair shops, distributors or recyclers. How these records work.
Where they are
- Baltimore: 5
- Beltsville: 2
- Frederick: 2
- Queenstown: 1
- Mount Airy: 1
- Hagerstown: 1
All medical devices and other goods manufacturing in Maryland: 69 facilities and Census job counts.