| Index | Knollwood | Illinois | National |
| Income per capita | $39,902 | $31,502 | $29,829 |
| Median household income | $126,250 | $59,196 | $55,322 |
| Median income owner occupied | $159,167 | $75,354 | $70,586 |
| Median income renter occupied | $103,607 | $34,488 | $35,192 |
| Median earnings male | $0 | $40,474 | $36,919 |
| Median earnings female | $40,833 | $27,197 | $26,250 |
| Unemployment rate | 2.6% | 5.3% | 4.7% |
| Poverty level | 3.0% | 14.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 8.8% | 8.8% |
| Manufacturing sector | 11.1% | 11.1% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 35.9% | 35.9% |
| Public administration | 12.9% | 12.9% |
| Transportation, warehousing & utilities | 0.0% | 0.0% |
| Education, health & social services | 17.1% | 17.1% |
| Other | 10.6% | 10.6% |
| City | Population | Household Income | National Avg. |
| Winnetka, IL | 12,361 | $250,001 | 351.9% |
| Kenilworth, IL | 2,356 | $241,591 | 336.7% |
| Riverwoods, IL | 3,536 | $231,477 | 318.4% |
| Kildeer, IL | 4,007 | $212,500 | 284.1% |
| Long Grove, IL | 7,907 | $207,188 | 274.5% |
| Knollwood, IL | 1,684 | $126,250 | 128.2% |
| City | Population | Household Income | National Avg. |
| Rouse, CA | 1,684 | $50,132 | 9.4% |
| Princeville, IL | 1,684 | $58,542 | 5.8% |
| Cassopolis, MI | 1,684 | $35,684 | 35.5% |
| East Helena, MT | 1,684 | $57,652 | 4.2% |
| Sturgeon Lake 154, AB | 1,684 | n/a | |
| Knollwood, IL | 1,684 | $126,250 | 128.2% |