| Rank | County | Percentage of Seniors | 
|---|---|---|
| 1 | Cape May County, New Jersey | 22.8% | 
| 2 | Ocean County, New Jersey | 21.5% | 
| 3 | Salem County, New Jersey | 16.0% | 
| 4 | Bergen County, New Jersey | 15.6% | 
| 5 | Atlantic County, New Jersey | 15.0% | 
| 6 | Warren County, New Jersey | 14.9% | 
| 7 | Burlington County, New Jersey | 14.7% | 
| 8 | Monmouth County, New Jersey | 14.7% | 
| 9 | Morris County, New Jersey | 14.7% | 
| 10 | Hunterdon County, New Jersey | 14.1% | 
| 11 | Camden County, New Jersey | 13.5% | 
| 12 | Sussex County, New Jersey | 13.4% | 
| 13 | Somerset County, New Jersey | 13.3% | 
| 14 | Gloucester County, New Jersey | 13.3% | 
| 15 | Mercer County, New Jersey | 13.2% | 
| 16 | Cumberland County, New Jersey | 13.1% | 
| 17 | Union County, New Jersey | 12.8% | 
| 18 | Middlesex County, New Jersey | 12.8% | 
| 19 | Passaic County, New Jersey | 12.6% | 
| 20 | Essex County, New Jersey | 12.0% | 
| 21 | Hudson County, New Jersey | 10.5% | 
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