| Index | Somonauk | Illinois | National |
| Median home price | $164,800 | $175,700 | $175,700 |
| Median rent asked | $712 | $903 | $920 |
| Avg. people per household | 2.8 | 2.6 | 2.6 |
| Owner occupied households | 79.9% | 66.9% | 64.4% |
| Renter occupied households | 20.1% | 33.1% | 35.6% |
| Index | Somonauk | Illinois | National |
| Zillow home value index | n/a | $168,800 | $196,500 |
| Year over year appreciation rate | n/a | 5.76% | 6.79% |
| 5 year average appreciation rate | n/a | 3.66% | 5.28% |
| 10 year average appreciation rate | n/a | -1.85% | 0.01% |
| City, State | Population | Home Price | National Avg. |
| Earlville, IL | 1,729 | $108,500 | 38% |
| Lee, IL | 335 | $121,300 | 31% |
| Plano, IL | 11,371 | $134,300 | 24% |
| Sheridan, IL | 2,026 | $140,200 | 20% |
| Leland, IL | 888 | $148,200 | 16% |
| Somonauk, IL | 2,191 | $164,800 | 6% |
| City, State | Population | Home Price | National Avg. |
| Old Orchard, PA | 2,191 | $242,900 | 38% |
| Parkside, PA | 2,192 | $143,100 | 19% |
| Washburn, WI | 2,190 | $122,400 | 30% |
| Jefferson, MD | 2,192 | $303,300 | 73% |
| Canajoharie, NY | 2,192 | $98,100 | 44% |
| Somonauk, IL | 2,191 | $164,800 | 6% |