| Index | Duck Key | Florida | National |
| Income per capita | $98,406 | $40,554 | $44,883 |
| Median household income | $158,074 | $72,078 | $81,333 |
| Median income owner occupied | $167,328 | $88,075 | $106,172 |
| Median income renter occupied | $0 | $51,794 | $52,080 |
| Median earnings male | $52,969 | $45,688 | $54,343 |
| Median earnings female | $39,733 | $37,493 | $38,439 |
| Unemployment rate | 0.7% | 5.2% | 4.9% |
| Poverty level | 18.7% | 16.1% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 11.3% | 11.3% |
| Manufacturing sector | 5.9% | 5.9% |
| Financial & insurance services | 1.7% | 1.7% |
| Wholesale & retail services | 2.1% | 2.1% |
| Public administration | 7.9% | 7.9% |
| Transportation, warehousing & utilities | 4.6% | 4.6% |
| Education, health & social services | 5.4% | 5.4% |
| Other | 61.1% | 61.1% |
| City | Population | Household Income | National Avg. |
| Key Colony Beach, FL | 543 | $135,757 | 66.9% |
| Marathon, FL | 8,934 | $83,411 | 2.6% |
| Layton, FL | 110 | $76,077 | 6.5% |
| Duck Key, FL | 780 | $158,074 | 94.4% |
| City | Population | Household Income | National Avg. |
| Independence, CA | 780 | $85,484 | 5.1% |
| Chevy Chase Section Five, MD | 780 | $371,983 | 357.4% |
| Fostoria, MI | 780 | $119,241 | 46.6% |
| Dover, MN | 780 | $125,380 | 54.2% |
| Roper, NC | 780 | $29,306 | 64.0% |
| Duck Key, FL | 780 | $158,074 | 94.4% |