| Index | Cortland | Illinois | National |
| Income per capita | $32,578 | $31,502 | $29,829 |
| Median household income | $74,821 | $59,196 | $55,322 |
| Median income owner occupied | $92,981 | $75,354 | $70,586 |
| Median income renter occupied | $60,759 | $34,488 | $35,192 |
| Median earnings male | $49,525 | $40,474 | $36,919 |
| Median earnings female | $25,313 | $27,197 | $26,250 |
| Unemployment rate | 4.2% | 5.3% | 4.7% |
| Poverty level | 4.5% | 14.0% | 15.1% |


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| Labour Type | Male | Female |
| Construction industry | 13.9% | 13.9% |
| Manufacturing sector | 12.9% | 12.9% |
| Financial & insurance services | 5.1% | 5.1% |
| Wholesale & retail services | 21.0% | 21.0% |
| Public administration | 3.2% | 3.2% |
| Transportation, warehousing & utilities | 8.4% | 8.4% |
| Education, health & social services | 11.7% | 11.7% |
| Other | 23.0% | 23.0% |
| City | Population | Household Income | National Avg. |
| Campton Hills, IL | 10,962 | $173,503 | 213.6% |
| Lily Lake, IL | 1,333 | $119,792 | 116.5% |
| Prestbury, IL | 1,978 | $112,155 | 102.7% |
| Sugar Grove, IL | 9,756 | $110,607 | 99.9% |
| Big Rock, IL | 1,271 | $106,375 | 92.3% |
| Cortland, IL | 4,261 | $74,821 | 35.2% |
| City | Population | Household Income | National Avg. |
| Highlands-Baywood Park, CA | 4,261 | $162,552 | 193.8% |
| Centralia, MO | 4,260 | $55,938 | 1.1% |
| Medina, TN | 4,260 | $69,129 | 25.0% |
| Morgan, UT | 4,259 | $79,153 | 43.1% |
| Lyons, GA | 4,263 | $25,792 | 53.4% |
| Cortland, IL | 4,261 | $74,821 | 35.2% |