Data
Plumbing companies in Delaware
There are 624 plumbing companies in Delaware (CityPreferred count, October 2026). Wilmington has the most (148), then Newark (58).
Reviewed October 1, 2026
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Delaware cities
| City | Companies |
|---|---|
| Wilmington | 148 |
| Newark | 58 |
| Lancashire | 37 |
| New Castle | 33 |
| Dover | 29 |
Delaware and the rest of the country
Delaware has 624 of the 185,402 plumbing companies in the country (0%). 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 Delaware?
- 624, by CityPreferred's count as of October 2026.
- Which Delaware city has the most?
- Wilmington, with 148, followed by Newark with 58.