| Index | Vandalia | Illinois | National |
| Cost of living | 85 | 98 | 100 |
| Groceries | 100 | 100 | 100 |
| Health care | 98 | 100 | 100 |
| Housing | 51 | 95 | 100 |
| Transportation | 100 | 101 | 100 |
| Utilities | 102 | 99 | 100 |
| Lifestyle & Entertainment | 97 | 100 | 100 |
| Household Items | 98 | 100 | 100 |
| Education & Childcare | 99 | 100 | 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 | $64,205 | $5,350 | $1,498 | $1,926 |
| Renters | $33,204 | $2,767 | $775 | $996 |
| State | General Sales Tax | With Max Surtax |
| Illinois | 6.25% | 10.25% |
| State | Income Tax (Low) | Income Tax (High) |
| Illinois | 4.95% | 4.95% |
| City | Population | Cost of Living Index | National Avg. |
| Bingham, IL | 90 | 99 | 0.7% |
| Smithboro, IL | 222 | 80 | 20.5% |
| Coffeen, IL | 659 | 80 | 19.5% |
| St. Peter, IL | 456 | 81 | 18.6% |
| Kinmundy, IL | 942 | 81 | 18.5% |
| Vandalia, IL | 6,854 | 85 | 15.3% |
| City | Population | Cost of Living Index | National Avg. |
| Contra Costa Centre, CA | 6,854 | 185 | 84.9% |
| Hamilton, AL | 6,853 | 84 | 16.1% |
| Notre Dame, IN | 6,853 | 90 | 9.5% |
| Logan, OH | 6,853 | 86 | 14.1% |
| Folcroft, PA | 6,856 | 94 | 6.1% |
| Vandalia, IL | 6,854 | 85 | 15.3% |