| Index | Delmar | Delaware | National |
| Income per capita | $31,238 | $46,894 | $44,883 |
| Median household income | $72,687 | $90,340 | $81,333 |
| Median income owner occupied | $79,327 | $109,575 | $106,172 |
| Median income renter occupied | $40,017 | $56,447 | $52,080 |
| Median earnings male | $54,740 | $57,948 | $54,343 |
| Median earnings female | $37,070 | $43,895 | $38,439 |
| Unemployment rate | 1.5% | 4.7% | 4.9% |
| Poverty level | 16.2% | 12.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 16.8% | 16.8% |
| Manufacturing sector | 13.3% | 13.3% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 17.6% | 17.6% |
| Public administration | 3.8% | 3.8% |
| Transportation, warehousing & utilities | 12.7% | 12.7% |
| Education, health & social services | 6.1% | 6.1% |
| Other | 22.5% | 22.5% |
| City | Population | Household Income | National Avg. |
| Allen, MD | 429 | $172,843 | 112.5% |
| Quantico, MD | 205 | $159,067 | 95.6% |
| Mount Vernon, MD | 1,052 | $131,934 | 62.2% |
| Mardela Springs, MD | 500 | $122,966 | 51.2% |
| Bethel, DE | 418 | $112,084 | 37.8% |
| Delmar, DE | 2,205 | $72,687 | 10.6% |
| City | Population | Household Income | National Avg. |
| Herington, KS | 2,205 | $68,945 | 15.2% |
| Krebs, OK | 2,205 | $61,321 | 24.6% |
| Lillian, AL | 2,204 | $74,648 | 8.2% |
| Weldon, CA | 2,204 | $55,053 | 32.3% |
| Thorsby, AL | 2,206 | $84,982 | 4.5% |
| Delmar, DE | 2,205 | $72,687 | 10.6% |