| Rank | County | Percentage of Residents Living In Multi-Unit Buildings | 
|---|---|---|
| 1 | New Haven County, Connecticut | 40.1% | 
| 2 | Hartford County, Connecticut | 38.6% | 
| 3 | Fairfield County, Connecticut | 35.4% | 
| 4 | New London County, Connecticut | 28.3% | 
| 5 | Windham County, Connecticut | 26.6% | 
| 6 | Tolland County, Connecticut | 24.3% | 
| 7 | Middlesex County, Connecticut | 22.8% | 
| 8 | Litchfield County, Connecticut | 21.5% | 
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