| Index | San Mar | Maryland | National |
| Income per capita | $33,492 | $55,489 | $44,883 |
| Median household income | $112,629 | $112,126 | $81,333 |
| Median income owner occupied | $113,575 | $142,381 | $106,172 |
| Median income renter occupied | $0 | $70,540 | $52,080 |
| Median earnings male | $57,584 | $69,331 | $54,343 |
| Median earnings female | $22,457 | $51,519 | $38,439 |
| Unemployment rate | 24.0% | 4.8% | 4.9% |
| Poverty level | 4.8% | 9.9% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 0.0% | 0.0% |
| Manufacturing sector | 36.6% | 36.6% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 61.0% | 61.0% |
| Public administration | 2.4% | 2.4% |
| Transportation, warehousing & utilities | 0.0% | 0.0% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 0.0% | 0.0% |
| City | Population | Household Income | National Avg. |
| Beaver Creek, MD | 554 | $291,714 | 258.7% |
| Jugtown, MD | 245 | $241,681 | 197.1% |
| Middletown, MD | 4,813 | $215,888 | 165.4% |
| Mount Aetna, MD | 614 | $204,934 | 152.0% |
| Myersville, MD | 2,284 | $183,780 | 126.0% |
| San Mar, MD | 327 | $112,629 | 38.5% |
| City | Population | Household Income | National Avg. |
| Cash, AR | 327 | $36,582 | 55.0% |
| Woodville, GA | 327 | $41,865 | 48.5% |
| Frederika, IA | 327 | $57,730 | 29.0% |
| Kiron, IA | 327 | $61,626 | 24.2% |
| Ute, IA | 327 | $56,755 | 30.2% |
| San Mar, MD | 327 | $112,629 | 38.5% |