| Index | Wonder Lake | Illinois | National |
| Median home price | $345,102 | $308,565 | $326,622 |
| Median rent asked | $1,117 | $1,374 | $1,444 |
| 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 | 8,005 | $218,272 | 33% |
| Harvard, IL | 9,547 | $226,550 | 31% |
| McCullom Lake, IL | 1,222 | $245,561 | 25% |
| Lake Ivanhoe, WI | 408 | $259,906 | 20% |
| Round Lake Beach, IL | 28,313 | $268,049 | 18% |
| Wonder Lake, IL | 4,084 | $345,102 | 6% |
| Population | Home Price | National Avg. | |
| Portland, MI | 4,084 | $224,706 | 31% |
| Blennerhassett, WV | 4,084 | $278,309 | 15% |
| Potosi, TX | 4,085 | $392,583 | 20% |
| Holiday City South, NJ | 4,083 | $313,342 | 4% |
| Echols County, GA | 4,085 | $136,965 | 58% |
| Wonder Lake, IL | 4,084 | $345,102 | 6% |