| Index | Knollwood | Illinois | National |
| Cost of living | 124 | 98 | 100 |
| Groceries | 100 | 100 | 100 |
| Health care | 100 | 100 | 100 |
| Housing | 177 | 95 | 100 |
| Transportation | 104 | 101 | 100 |
| Utilities | 99 | 99 | 100 |
| Lifestyle & Entertainment | 103 | 100 | 100 |
| Household Items | 101 | 100 | 100 |
| Education & Childcare | 101 | 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 | $235,854 | $19,655 | $5,503 | $7,076 |
| Renters | $154,375 | $12,865 | $3,602 | $4,632 |
| 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. |
| Park City, IL | 7,894 | 82 | 18.2% |
| North Chicago, IL | 30,865 | 95 | 5.0% |
| Round Lake Park, IL | 8,005 | 95 | 5.3% |
| Waukegan, IL | 90,063 | 96 | 4.1% |
| Zion, IL | 24,329 | 96 | 3.7% |
| Knollwood, IL | 1,738 | 124 | 24.0% |
| City | Population | Cost of Living Index | National Avg. |
| Cedarville, AR | 1,738 | 86 | 14.4% |
| Limestone Creek, FL | 1,738 | 122 | 21.5% |
| Angola on the Lake, NY | 1,738 | 103 | 3.2% |
| Port Carbon, PA | 1,738 | 86 | 14.2% |
| Northampton, NB | 1,738 | n/a | |
| Knollwood, IL | 1,738 | 124 | 24.0% |