| Index | Garretts Mill | Maryland | National |
| Income per capita | $76,147 | $55,489 | $44,883 |
| Median household income | $0 | $112,126 | $81,333 |
| Median income owner occupied | $0 | $142,381 | $106,172 |
| Median income renter occupied | $0 | $70,540 | $52,080 |
| Median earnings male | $61,539 | $69,331 | $54,343 |
| Median earnings female | $0 | $51,519 | $38,439 |
| Unemployment rate | 0.0% | 4.8% | 4.9% |
| Poverty level | 0.0% | 9.9% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 0.0% | 0.0% |
| Manufacturing sector | 0.0% | 0.0% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 0.0% | 0.0% |
| Public administration | 16.2% | 16.2% |
| Transportation, warehousing & utilities | 0.0% | 0.0% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 83.8% | 83.8% |
| City | Population | Household Income | National Avg. |
| Poolesville, MD | 5,340 | $277,813 | 241.6% |
| Adamstown, MD | 2,201 | $253,358 | 211.5% |
| Hillsboro, VA | 203 | $246,886 | 203.5% |
| Middletown, MD | 4,813 | $215,888 | 165.4% |
| Purcellville, VA | 10,402 | $198,148 | 143.6% |
| Garretts Mill, MD | 359 | $0 | 100.0% |
| City | Population | Household Income | National Avg. |
| Trinidad, CA | 359 | $129,944 | 59.8% |
| Bode, IA | 359 | $73,412 | 9.7% |
| Grand View, ID | 359 | $52,586 | 35.3% |
| Sedalia, KY | 359 | $66,775 | 17.9% |
| Anamoose, ND | 359 | $95,664 | 17.6% |
| Garretts Mill, MD | 359 | $0 | 100.0% |