Data
Plumbing companies in Maryland
There are 3,228 plumbing companies in Maryland (CityPreferred count, October 2026). Baltimore has the most (232), then Silver Spring (93).
Reviewed October 1, 2026
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Maryland cities
| City | Companies |
|---|---|
| Baltimore | 232 |
| Silver Spring | 93 |
| Gaithersburg | 92 |
| Frederick | 84 |
| Maryland City | 84 |
| Rockville | 64 |
| Waldorf | 57 |
| Pasadena | 55 |
| Laurel | 55 |
| Hyattsville | 49 |
| Westminster | 48 |
| Annapolis | 47 |
| Hagerstown | 45 |
| Bowie | 44 |
| Cumberland | 41 |
| Essex | 40 |
| Clinton | 36 |
| Columbia | 36 |
| Bel Air | 35 |
| Parkville | 33 |
| Glen Burnie | 32 |
| Catonsville | 32 |
| Salisbury | 31 |
| Germantown | 30 |
| Mount Airy | 29 |
| Upper Marlboro | 27 |
| Bethesda | 26 |
| Middle River | 26 |
| Sykesville | 24 |
| Ellicott City | 22 |
| Dundalk | 22 |
| Nottingham | 21 |
| Beltsville | 21 |
| Mechanicsville | 21 |
| Berlin | 20 |
| Fallston | 20 |
| Halethorpe | 20 |
Maryland and the rest of the country
Maryland has 3,228 of the 185,402 plumbing companies in the country (2%). All states.
What is counted
Independent businesses that do this work, for homes or for businesses. Suppliers, stores and national chains are left out. Being counted does not mean a company is licensed, insured or recommended. A city is listed when it has 20 or more. How we count.
Questions and answers
- How many plumbing companies are there in Maryland?
- 3,228, by CityPreferred's count as of October 2026.
- Which Maryland city has the most?
- Baltimore, with 232, followed by Silver Spring with 93.