| Index | San Carlos | Texas | National |
| Income per capita | $10,419 | $27,828 | $29,829 |
| Median household income | $29,576 | $54,727 | $55,322 |
| Median income owner occupied | $31,361 | $70,980 | $70,586 |
| Median income renter occupied | $0 | $36,330 | $35,192 |
| Median earnings male | $21,508 | $36,153 | $36,919 |
| Median earnings female | $12,500 | $25,035 | $26,250 |
| Unemployment rate | 11.6% | 4.1% | 4.7% |
| Poverty level | 35.0% | 16.7% | 15.1% |
| Labour Type | Male | Female |
| Construction industry | 44.0% | 44.0% |
| Manufacturing sector | 9.4% | 9.4% |
| Financial & insurance services | 0.0% | 0.0% |
| Wholesale & retail services | 22.2% | 22.2% |
| Public administration | 5.0% | 5.0% |
| Transportation, warehousing & utilities | 1.3% | 1.3% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 12.0% | 12.0% |
| City | Population | Household Income | National Avg. |
| Zapata Ranch, TX | 216 | $91,383 | 65.2% |
| Relampago, TX | 387 | $81,310 | 47.0% |
| Palmhurst, TX | 2,723 | $76,131 | 37.6% |
| César Chávez, TX | 709 | $62,056 | 12.2% |
| Murillo, TX | 9,331 | $60,964 | 10.2% |
| San Carlos, TX | 3,945 | $29,576 | 46.5% |
| City | Population | Household Income | National Avg. |
| Cartier, MB | 3,945 | n/a | |
| Echols County, GA | 3,944 | $44,454 | 19.6% |
| Montpelier, OH | 3,944 | $41,320 | 25.3% |
| Gatlinburg, TN | 3,944 | $41,037 | 25.8% |
| Washington, GA | 3,946 | $31,902 | 42.3% |
| San Carlos, TX | 3,945 | $29,576 | 46.5% |
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