| Index | Somonauk | Illinois | National |
| Income per capita | $49,711 | $47,397 | $44,883 |
| Median household income | $104,658 | $88,967 | $81,333 |
| Median income owner occupied | $131,144 | $111,557 | $106,172 |
| Median income renter occupied | $68,180 | $52,117 | $52,080 |
| Median earnings male | $70,679 | $60,185 | $54,343 |
| Median earnings female | $37,025 | $40,368 | $38,439 |
| Unemployment rate | 1.4% | 6.6% | 4.9% |
| Poverty level | 7.7% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 20.6% | 20.6% |
| Manufacturing sector | 17.6% | 17.6% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 18.5% | 18.5% |
| Public administration | 3.6% | 3.6% |
| Transportation, warehousing & utilities | 11.2% | 11.2% |
| Education, health & social services | 7.9% | 7.9% |
| Other | 17.4% | 17.4% |
| City | Population | Household Income | National Avg. |
| Prestbury, IL | 2,025 | $167,845 | 106.4% |
| Sugar Grove, IL | 9,959 | $164,873 | 102.7% |
| Big Rock, IL | 1,298 | $159,808 | 96.5% |
| Yorkville, IL | 19,794 | $152,534 | 87.5% |
| Newark, IL | 1,376 | $150,603 | 85.2% |
| Somonauk, IL | 2,099 | $104,658 | 28.7% |
| City | Population | Household Income | National Avg. |
| West Branch, MI | 2,099 | $44,602 | 45.2% |
| Groton, NY | 2,099 | $84,617 | 4.0% |
| Marbury, AL | 2,100 | $73,531 | 9.6% |
| Kountze, TX | 2,098 | $85,042 | 4.6% |
| Wolf Creek, UT | 2,098 | $184,761 | 127.2% |
| Somonauk, IL | 2,099 | $104,658 | 28.7% |