| Index | Cortland | Illinois | National |
| Income per capita | $49,010 | $47,397 | $44,883 |
| Median household income | $113,463 | $88,967 | $81,333 |
| Median income owner occupied | $140,721 | $111,557 | $106,172 |
| Median income renter occupied | $88,859 | $52,117 | $52,080 |
| Median earnings male | $72,947 | $60,185 | $54,343 |
| Median earnings female | $36,815 | $40,368 | $38,439 |
| Unemployment rate | 4.4% | 6.6% | 4.9% |
| Poverty level | 4.5% | 14.0% | 15.1% |

| 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 | 11,243 | $259,945 | 219.6% |
| Lily Lake, IL | 1,360 | $175,176 | 115.4% |
| 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% |
| Cortland, IL | 4,384 | $113,463 | 39.5% |
| City | Population | Household Income | National Avg. |
| American Falls, ID | 4,384 | $74,053 | 9.0% |
| Bellingham, MA | 4,383 | $94,120 | 15.7% |
| Grant-Valkaria, FL | 4,385 | $136,310 | 67.6% |
| Millinocket, ME | 4,385 | $62,964 | 22.6% |
| Beaver, PA | 4,385 | $88,030 | 8.2% |
| Cortland, IL | 4,384 | $113,463 | 39.5% |