| Index | Knollwood | Illinois | National |
| Median home price | $319,600 | $174,800 | $184,700 |
| Median rent asked | $1,741 | $925 | $949 |
| Avg. people per household | 3.0 | 2.6 | 2.6 |
| Owner occupied households | 67.4% | 66.0% | 63.6% |
| Renter occupied households | 32.6% | 34.0% | 36.4% |
| Population | Home Price | National Avg. | |
| Park City, IL | 7,636 | $23,200 | 87% |
| North Chicago, IL | 29,967 | $107,900 | 42% |
| Round Lake Park, IL | 7,744 | $120,100 | 35% |
| Zion, IL | 23,677 | $137,700 | 25% |
| Waukegan, IL | 87,157 | $140,300 | 24% |
| Knollwood, IL | 1,684 | $319,600 | 73% |
| Population | Home Price | National Avg. | |
| Cassopolis, MI | 1,684 | $69,300 | 62% |
| East Helena, MT | 1,684 | $192,700 | 4% |
| Princeville, IL | 1,684 | $131,200 | 29% |
| Rouse, CA | 1,684 | $168,500 | 9% |
| Oswego, KS | 1,683 | $62,500 | 66% |
| Knollwood, IL | 1,684 | $319,600 | 73% |
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