| Index | South Mountain | Texas | National |
| Income per capita | $38,399 | $41,777 | $44,883 |
| Median household income | $82,046 | $80,880 | $81,333 |
| Median income owner occupied | $82,134 | $107,635 | $106,172 |
| Median income renter occupied | $0 | $54,463 | $52,080 |
| Median earnings male | $63,069 | $53,620 | $54,343 |
| Median earnings female | $34,897 | $36,296 | $38,439 |
| Unemployment rate | 2.7% | 4.3% | 4.9% |
| Poverty level | 11.1% | 16.7% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 20.6% | 20.6% |
| Manufacturing sector | 1.0% | 1.0% |
| Financial & insurance services | 1.0% | 1.0% |
| Wholesale & retail services | 3.9% | 3.9% |
| Public administration | 2.9% | 2.9% |
| Transportation, warehousing & utilities | 8.8% | 8.8% |
| Education, health & social services | 23.5% | 23.5% |
| Other | 35.3% | 35.3% |
| City | Population | Household Income | National Avg. |
| Crawford, TX | 1,017 | $78,829 | 3.1% |
| Oglesby, TX | 628 | $76,836 | 5.5% |
| Gatesville, TX | 13,875 | $67,535 | 17.0% |
| South Mountain, TX | 451 | $82,046 | 0.9% |
| City | Population | Household Income | National Avg. |
| Lake City, CO | 451 | $58,618 | 27.9% |
| Groton Long Point, CT | 451 | $163,558 | 101.1% |
| Bonnie, IL | 451 | $86,748 | 6.7% |
| Plymouth, IL | 451 | $69,054 | 15.1% |
| Kewanna, IN | 451 | $46,614 | 42.7% |
| South Mountain, TX | 451 | $82,046 | 0.9% |