| Index | Prairie Grove | Illinois | National |
| Cost of living | 132 | 98 | 100 |
| Groceries | 101 | 100 | 100 |
| Health care | 101 | 100 | 100 |
| Housing | 205 | 95 | 100 |
| Transportation | 100 | 101 | 100 |
| Utilities | 99 | 99 | 100 |
| Lifestyle & Entertainment | 99 | 100 | 100 |
| Household Items | 102 | 100 | 100 |
| Education & Childcare | 100 | 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 | $184,773 | $15,398 | $4,311 | $5,544 |
| Renters | $93,781 | $7,815 | $2,188 | $2,814 |
| 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. |
| Round Lake Park, IL | 8,005 | 95 | 5.3% |
| McCullom Lake, IL | 1,222 | 97 | 2.5% |
| Union, IL | 699 | 99 | 1.2% |
| Round Lake Beach, IL | 28,313 | 98 | 1.7% |
| Wonder Lake, IL | 4,084 | 99 | 0.6% |
| Prairie Grove, IL | 2,089 | 132 | 31.9% |
| City | Population | Cost of Living Index | National Avg. |
| Pahala, HI | 2,089 | 113 | 12.9% |
| Grove Hill, AL | 2,088 | 87 | 13.1% |
| Fort Denaud, FL | 2,088 | 106 | 5.8% |
| Washington Park, FL | 2,088 | 110 | 10.0% |
| Ortonville, MN | 2,090 | 87 | 13.0% |
| Prairie Grove, IL | 2,089 | 132 | 31.9% |