| Index | Wonder Lake | Illinois | National |
| Median home price | $186,900 | $174,800 | $184,700 |
| Median rent asked | $726 | $925 | $949 |
| Avg. people per household | 2.3 | 2.6 | 2.6 |
| Owner occupied households | 87.0% | 66.0% | 63.6% |
| Renter occupied households | 13.0% | 34.0% | 36.4% |
| Population | Home Price | National Avg. | |
| Round Lake Park, IL | 7,744 | $120,100 | 35% |
| Harvard, IL | 9,203 | $128,000 | 31% |
| McCullom Lake, IL | 1,193 | $138,800 | 25% |
| Lake Ivanhoe, WI | 398 | $145,200 | 21% |
| Round Lake Beach, IL | 27,313 | $149,000 | 19% |
| Wonder Lake, IL | 3,955 | $186,900 | 1% |
| Population | Home Price | National Avg. | |
| Mills, WY | 3,955 | $126,200 | 32% |
| Ashland, MO | 3,956 | $196,900 | 7% |
| Weaverville, NC | 3,956 | $320,300 | 73% |
| Level Green, PA | 3,957 | $168,400 | 9% |
| Grand Mound, WA | 3,957 | $239,000 | 29% |
| Wonder Lake, IL | 3,955 | $186,900 | 1% |
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