| Index | Monmouth | Illinois | National |
| Income per capita | $35,296 | $47,397 | $44,883 |
| Median household income | $76,211 | $88,967 | $81,333 |
| Median income owner occupied | $93,736 | $111,557 | $106,172 |
| Median income renter occupied | $47,462 | $52,117 | $52,080 |
| Median earnings male | $39,968 | $60,185 | $54,343 |
| Median earnings female | $26,309 | $40,368 | $38,439 |
| Unemployment rate | 8.7% | 6.6% | 4.9% |
| Poverty level | 16.0% | 14.0% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 3.0% | 3.0% |
| Manufacturing sector | 18.2% | 18.2% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 13.9% | 13.9% |
| Public administration | 1.4% | 1.4% |
| Transportation, warehousing & utilities | 12.9% | 12.9% |
| Education, health & social services | 24.2% | 24.2% |
| Other | 25.4% | 25.4% |
| City | Population | Household Income | National Avg. |
| Biggsville, IL | 452 | $131,195 | 61.3% |
| North Henderson, IL | 245 | $109,943 | 35.2% |
| Media, IL | 114 | $95,938 | 18.0% |
| Rio, IL | 215 | $91,767 | 12.8% |
| Seaton, IL | 287 | $87,130 | 7.1% |
| Monmouth, IL | 9,066 | $76,211 | 6.3% |
| City | Population | Household Income | National Avg. |
| Smithville, NJ | 9,067 | $88,384 | 8.7% |
| Miramar Beach, FL | 9,072 | $114,984 | 41.4% |
| Champlain, ON | 9,072 | n/a | |
| Pulaski, VA | 9,058 | $74,450 | 8.5% |
| Cortez, CO | 9,056 | $62,172 | 23.6% |
| Monmouth, IL | 9,066 | $76,211 | 6.3% |