| Index | Markham | Texas | National |
| Income per capita | $24,776 | $41,777 | $44,883 |
| Median household income | $64,094 | $80,880 | $81,333 |
| Median income owner occupied | $65,917 | $107,635 | $106,172 |
| Median income renter occupied | $0 | $54,463 | $52,080 |
| Median earnings male | $57,825 | $53,620 | $54,343 |
| Median earnings female | $0 | $36,296 | $38,439 |
| Unemployment rate | 0.0% | 4.3% | 4.9% |
| Poverty level | 7.7% | 16.7% | 15.1% |

| Labour Type | Male | Female |
| Construction industry | 0.0% | 0.0% |
| Manufacturing sector | 50.8% | 50.8% |
| Financial & insurance services | 8.5% | 8.5% |
| Wholesale & retail services | 0.0% | 0.0% |
| Public administration | 0.0% | 0.0% |
| Transportation, warehousing & utilities | 25.4% | 25.4% |
| Education, health & social services | 0.0% | 0.0% |
| Other | 15.3% | 15.3% |
| City | Population | Household Income | National Avg. |
| Bay City, TX | 18,090 | $68,307 | 16.0% |
| Van Vleck, TX | 1,326 | $63,500 | 21.9% |
| Blessing, TX | 500 | $0 | 100.0% |
| Markham, TX | 1,063 | $64,094 | 21.2% |
| City | Population | Household Income | National Avg. |
| Clio, AL | 1,063 | $33,388 | 58.9% |
| Monte Rio, CA | 1,063 | $61,309 | 24.6% |
| Sloan, IA | 1,063 | $105,168 | 29.3% |
| Oxford, ME | 1,063 | $0 | 100.0% |
| Belgrade, MN | 1,063 | $77,662 | 4.5% |
| Markham, TX | 1,063 | $64,094 | 21.2% |