| Index | Marthasville | Missouri | National |
| Income per capita | $38,988 | $39,715 | $44,883 |
| Median household income | $145,684 | $72,613 | $81,333 |
| Median income owner occupied | $149,289 | $90,986 | $106,172 |
| Median income renter occupied | $72,590 | $45,210 | $52,080 |
| Median earnings male | $69,875 | $52,324 | $54,343 |
| Median earnings female | $50,535 | $36,971 | $38,439 |
| Unemployment rate | 0.8% | 4.4% | 4.9% |
| Poverty level | 3.5% | 15.3% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 49.9% | 49.9% |
| Manufacturing sector | 17.5% | 17.5% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 9.5% | 9.5% |
| Public administration | 0.6% | 0.6% |
| Transportation, warehousing & utilities | 3.7% | 3.7% |
| Education, health & social services | 7.0% | 7.0% |
| Other | 11.1% | 11.1% |
| City | Population | Household Income | National Avg. |
| Innsbrook, MO | 869 | $210,335 | 158.6% |
| Lake St. Louis, MO | 16,749 | $147,806 | 81.7% |
| Josephville, MO | 645 | $141,278 | 73.7% |
| New Melle, MO | 443 | $140,826 | 73.1% |
| Wentzville, MO | 41,279 | $140,656 | 72.9% |
| Marthasville, MO | 2,476 | $145,684 | 79.1% |
| City | Population | Household Income | National Avg. |
| Anahola, HI | 2,476 | $89,762 | 10.4% |
| Kalaeloa, HI | 2,475 | $91,924 | 13.0% |
| Dover, AR | 2,474 | $46,473 | 42.9% |
| Hudson, MI | 2,474 | $71,817 | 11.7% |
| Warsaw, MO | 2,474 | $57,061 | 29.8% |
| Marthasville, MO | 2,476 | $145,684 | 79.1% |