| Index | Mermentau | Louisiana | National |
| Income per capita | $16,939 | $25,515 | $29,829 |
| Median household income | $39,539 | $45,652 | $55,322 |
| Median income owner occupied | $48,835 | $59,392 | $70,586 |
| Median income renter occupied | $16,136 | $27,113 | $35,192 |
| Median earnings male | $0 | $38,087 | $36,919 |
| Median earnings female | $17,031 | $22,909 | $26,250 |
| Unemployment rate | 5.5% | 4.6% | 4.7% |
| Poverty level | 26.0% | 19.7% | 15.1% |
| Labour Type | Male | Female |
| Construction industry | 21.6% | 21.6% |
| Manufacturing sector | 10.8% | 10.8% |
| Financial & insurance services | 5.9% | 5.9% |
| Wholesale & retail services | 14.7% | 14.7% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 2.0% | 2.0% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 45.1% | 45.1% |
| City | Population | Household Income | National Avg. |
| Morse, LA | 1,239 | $82,609 | 49.3% |
| Egan, LA | 1,002 | $76,424 | 38.1% |
| Welsh, LA | 3,209 | $44,911 | 18.8% |
| Estherwood, LA | 676 | $36,250 | 34.5% |
| Iota, LA | 1,752 | $35,208 | 36.4% |
| Mermentau, LA | 616 | $39,539 | 28.5% |
| City | Population | Household Income | National Avg. |
| Shipman, IL | 616 | $46,944 | 15.1% |
| Killona, LA | 616 | $21,721 | 60.7% |
| Parma, MO | 616 | $28,900 | 47.8% |
| Sherman, MS | 616 | $31,625 | 42.8% |
| Newton Grove, NC | 616 | $55,962 | 1.2% |
| Mermentau, LA | 616 | $39,539 | 28.5% |
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