| Index | Arnold | Maryland | National |
| Income per capita | $76,884 | $55,489 | $44,883 |
| Median household income | $175,192 | $112,126 | $81,333 |
| Median income owner occupied | $200,598 | $142,381 | $106,172 |
| Median income renter occupied | $121,454 | $70,540 | $52,080 |
| Median earnings male | $111,423 | $69,331 | $54,343 |
| Median earnings female | $66,806 | $51,519 | $38,439 |
| Unemployment rate | 2.8% | 4.8% | 4.9% |
| Poverty level | 3.8% | 9.9% | 15.1% |

| 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 | 11,153 | $260,848 | 220.7% |
| Fairwood, MD | 6,920 | $255,865 | 214.6% |
| Woodmore, MD | 4,820 | $254,220 | 212.6% |
| Galesville, MD | 1,299 | $246,258 | 202.8% |
| Severna Park, MD | 39,770 | $228,814 | 181.3% |
| Arnold, MD | 24,899 | $175,192 | 115.4% |
| City | Population | Household Income | National Avg. |
| Papillion, NE | 24,905 | $135,185 | 66.2% |
| Bridgeton, NJ | 24,883 | $57,521 | 29.3% |
| North Potomac, MD | 24,916 | $251,631 | 209.4% |
| Sturgeon County, AB | 24,881 | n/a | |
| San Benito, TX | 24,920 | $46,256 | 43.1% |
| Arnold, MD | 24,899 | $175,192 | 115.4% |