| Rank | County | Businesses | 
|---|---|---|
| 1 | Fairfield County, Connecticut | 108,910 | 
| 2 | New Haven County, Connecticut | 74,477 | 
| 3 | Hartford County, Connecticut | 72,906 | 
| 4 | New London County, Connecticut | 21,733 | 
| 5 | Litchfield County, Connecticut | 21,435 | 
| 6 | Middlesex County, Connecticut | 15,693 | 
| 7 | Tolland County, Connecticut | 11,698 | 
| 8 | Windham County, Connecticut | 8,491 | 
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