Construction Companies in Delaware

In short 506 construction companies in Ken's database have their headquarters in Delaware (Oct 17, 2026).

In short By employee count in Ken's database, the largest is Diamond Materials, LLC in Newport with 51-200 employees.

In short We counted construction companies in Ken's database with headquarters in Delaware on Oct 17, 2026.

• Filter: Companies in Construction and its sub-industries (contractors, civil engineering), excluding real estate, utilities and architecture firms, with headquarters in Delaware, United States, and at least one employee on record.
• Headquarters only. Companies with just an office in Delaware are not counted.
• These are companies in Ken's database (250M people and 24M companies), not every company that exists.
• Some records store the state with a ZIP code, and the state filter misses those, so read the count as a floor. The largest-companies table reads the state from each record's address, so it includes them.
• Counts as of Oct 17, 2026. We check them weekly, and the dates move only when a count or a listed company changes.
• Pages publish only at 50 companies or more. Ken is our product, and these counts come from its company database.

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