| Index | Mount Vernon | South Dakota | National |
| Income per capita | $41,555 | $41,166 | $44,883 |
| Median household income | $68,919 | $77,914 | $81,333 |
| Median income owner occupied | $92,071 | $100,475 | $106,172 |
| Median income renter occupied | $31,969 | $45,187 | $52,080 |
| Median earnings male | $42,800 | $52,540 | $54,343 |
| Median earnings female | $42,571 | $36,073 | $38,439 |
| Unemployment rate | 1.9% | 2.9% | 4.9% |
| Poverty level | 2.8% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 12.2% | 12.2% |
| Manufacturing sector | 13.7% | 13.7% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 6.3% | 6.3% |
| Public administration | 3.4% | 3.4% |
| Transportation, warehousing & utilities | 4.4% | 4.4% |
| Education, health & social services | 3.4% | 3.4% |
| Other | 55.1% | 55.1% |
| City | Population | Household Income | National Avg. |
| Plankinton, SD | 730 | $94,983 | 16.8% |
| Ethan, SD | 341 | $85,614 | 5.3% |
| Letcher, SD | 195 | $82,883 | 1.9% |
| Stickney, SD | 275 | $79,703 | 2.0% |
| Mitchell, SD | 16,163 | $66,736 | 17.9% |
| Mount Vernon, SD | 514 | $68,919 | 15.3% |
| City | Population | Household Income | National Avg. |
| Belle Fontaine, AL | 514 | $80,368 | 1.2% |
| Cullom, IL | 514 | $75,848 | 6.7% |
| Waynesville, IL | 514 | $97,256 | 19.6% |
| Bird City, KS | 514 | $56,726 | 30.3% |
| Vernon, MI | 514 | $87,905 | 8.1% |
| Mount Vernon, SD | 514 | $68,919 | 15.3% |