| Index | Marvin | South Dakota | National |
| Cost of living | 79 | 92 | 100 |
| Groceries | 101 | 99 | 100 |
| Health care | 100 | 97 | 100 |
| Housing | 32 | 77 | 100 |
| Transportation | 95 | 96 | 100 |
| Utilities | 104 | 103 | 100 |
| Lifestyle & Entertainment | 101 | 94 | 100 |
| Household Items | 97 | 96 | 100 |
| Education & Childcare | 100 | 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 | $85,658 | $7,138 | $1,999 | $2,570 |
| Renters | $0 | $0 | $0 | $0 |
| 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. |
| Ortley, SD | 60 | 76 | 24.0% |
| La Bolt, SD | 103 | 76 | 24.0% |
| Corona, SD | 46 | 79 | 21.0% |
| Twin Brooks, SD | 46 | 80 | 19.9% |
| Strandburg, SD | 82 | 80 | 20.5% |
| Marvin, SD | 19 | 79 | 20.5% |
| City | Population | Cost of Living Index | National Avg. |
| Red Devil, AK | 19 | 97 | 3.0% |
| Alamo Lake, AZ | 19 | 102 | 2.5% |
| Little Valley, CA | 19 | 117 | 17.4% |
| Redcrest, CA | 19 | 117 | 17.4% |
| Shoshone, CA | 19 | 102 | 1.8% |
| Marvin, SD | 19 | 79 | 20.5% |