| Company | Category | Area | Address | Web | E-mail | Contact person |
| JOHN DRIGGS CO INC | Contractors-Equip/Supls-Dlrs/S | Maryland | 8723 ASHWOOD DR, CAPITOL HGTS, Prince Georges, Maryland, 20743-3728, USA |
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John Driggs |
| JOHN DUCKWORTH COAL CO | Coal & Coke-Wholesale | Maryland | 16310 DUCK HILL DR NW, FROSTBURG, Allegany, Maryland, 21532-3215, USA |
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John Duckworth |
| JOHN DUMLER | Attorneys | Maryland | 8441 BELAIR RD STE 202, BALTIMORE, Baltimore, Maryland, 21236-3038, USA |
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John Dumler |
| JOHN DURAND PHOTOGRAPHY | Photographers-Commercial | Maryland | 1400 COPPERMINE TER, BALTIMORE, Baltimore City, Maryland, 21209-2012, USA |
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John Durand |
