Top 10 counties with the most construction businesses
Los Angeles County leads with 17,404. The 10 US counties with the most construction establishments (NAICS 23), from US Census County Business Patterns 2022.
| # | Name | Construction establishments |
|---|---|---|
| 1 | Los Angeles County · CA | 17,404 |
| 2 | Cook County · IL | 10,766 |
| 3 | Maricopa County · AZ | 9,311 |
| 4 | San Diego County · CA | 8,171 |
| 5 | Suffolk County · NY | 7,806 |
| 6 | Orange County · CA | 7,651 |
| 7 | Harris County · TX | 7,623 |
| 8 | King County · WA | 6,749 |
| 9 | Miami-Dade County · FL | 6,519 |
| 10 | Queens County · NY | 6,157 |
Methodology
Total NAICS 23 (Construction) establishments per county, US Census CBP 2022.
As of 2026-05-28. ACS 2023 5-year + CBP 2022.
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