| Index | Mermentau | Louisiana | National |
| Income per capita | $25,539 | $37,400 | $44,883 |
| Median household income | $57,885 | $67,394 | $81,333 |
| Median income owner occupied | $72,138 | $88,635 | $106,172 |
| Median income renter occupied | $24,117 | $40,850 | $52,080 |
| Median earnings male | $0 | $55,004 | $54,343 |
| Median earnings female | $25,257 | $33,160 | $38,439 |
| Unemployment rate | 5.8% | 4.8% | 4.9% |
| 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 | 1,271 | $120,921 | 48.7% |
| Egan, LA | 1,031 | $113,965 | 40.1% |
| Welsh, LA | 3,307 | $65,659 | 19.3% |
| Estherwood, LA | 698 | $54,671 | 32.8% |
| Iota, LA | 1,805 | $53,036 | 34.8% |
| Mermentau, LA | 637 | $57,885 | 28.8% |
| City | Population | Household Income | National Avg. |
| Pimaco Two, AZ | 637 | $49,159 | 39.6% |
| Lidgerwood, ND | 637 | $65,677 | 19.2% |
| Harrisville, NY | 637 | $61,361 | 24.6% |
| Sharon Springs, NY | 637 | $69,717 | 14.3% |
| Shickshinny, PA | 637 | $57,768 | 29.0% |
| Mermentau, LA | 637 | $57,885 | 28.8% |