| Index | Arnold | Maryland | National |
| Income per capita | $50,786 | $37,756 | $29,829 |
| Median household income | $119,504 | $76,067 | $55,322 |
| Median income owner occupied | $132,400 | $95,994 | $70,586 |
| Median income renter occupied | $81,201 | $47,333 | $35,192 |
| Median earnings male | $75,017 | $46,495 | $36,919 |
| Median earnings female | $45,557 | $35,612 | $26,250 |
| Unemployment rate | 2.7% | 4.5% | 4.7% |
| Poverty level | 3.8% | 9.9% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 8.6% | 8.6% |
| Manufacturing sector | 6.5% | 6.5% |
| Financial & insurance services | 3.8% | 3.8% |
| Wholesale & retail services | 17.0% | 17.0% |
| Public administration | 11.8% | 11.8% |
| Transportation, warehousing & utilities | 5.4% | 5.4% |
| Education, health & social services | 14.8% | 14.8% |
| Other | 30.2% | 30.2% |
| City | Population | Household Income | National Avg. |
| Brock Hall, MD | 10,926 | $174,569 | 215.6% |
| Fairwood, MD | 6,780 | $171,071 | 209.2% |
| Woodmore, MD | 4,698 | $168,245 | 204.1% |
| Galesville, MD | 1,262 | $167,723 | 203.2% |
| Severna Park, MD | 38,729 | $151,969 | 174.7% |
| Arnold, MD | 24,334 | $119,504 | 116.0% |
| City | Population | Household Income | National Avg. |
| Mequon, WI | 24,357 | $128,403 | 132.1% |
| Papillion, NE | 24,310 | $90,000 | 62.7% |
| Avon Lake, OH | 24,309 | $82,994 | 50.0% |
| Palmetto Bay, FL | 24,308 | $123,235 | 122.8% |
| Wasaga Beach, ON | 24,372 | n/a | |
| Arnold, MD | 24,334 | $119,504 | 116.0% |