| Index | Mount Vernon | South Dakota | National |
| Cost of living | 84 | 92 | 100 |
| Groceries | 98 | 99 | 100 |
| Health care | 95 | 97 | 100 |
| Housing | 55 | 77 | 100 |
| Transportation | 93 | 96 | 100 |
| Utilities | 104 | 103 | 100 |
| Lifestyle & Entertainment | 93 | 94 | 100 |
| Household Items | 95 | 96 | 100 |
| Education & Childcare | 98 | 98 | 100 |

| Cost of living index | |
| Groceries index | |
| Health care index | |
| Housing index | |
| Transportation index | |
| Utilities index | |
| Lifestyle index | |
| Household index | |
| Educare index |
| Median Income | Per Year | Per Month | Max Budget (28% DTI) | Max Budget (36% DTI) |
| Owners | $92,071 | $7,673 | $2,148 | $2,762 |
| Renters | $31,969 | $2,664 | $746 | $959 |
| State | General Sales Tax | With Max Surtax |
| South Dakota | 4.5% | 6% |
| State | Income Tax (Low) | Income Tax (High) |
| South Dakota | 0% | 0% |
| City | Population | Cost of Living Index | National Avg. |
| Loomis, SD | 0 | 96 | 3.5% |
| Storla, SD | 22 | 96 | 3.5% |
| Stickney, SD | 275 | 82 | 18.2% |
| Plankinton, SD | 730 | 83 | 16.6% |
| Ethan, SD | 341 | 86 | 14.1% |
| Mount Vernon, SD | 514 | 84 | 15.9% |
| City | Population | Cost of Living Index | National Avg. |
| Belle Fontaine, AL | 514 | 87 | 12.5% |
| Cullom, IL | 514 | 85 | 14.8% |
| Waynesville, IL | 514 | 83 | 17.2% |
| Bird City, KS | 514 | 82 | 18.3% |
| Vernon, MI | 514 | 82 | 17.8% |
| Mount Vernon, SD | 514 | 84 | 15.9% |