| Index | Saint-Thomas | Quebec | National |
| Median household income | $74,331 | $72,311 | $82,436 |
| Unemployment rate | 3.0% | 3.7% | 6.4% |
| In labour force | 62.9% | 64.3% | 63.9% |
| Labour Type | Percent |
| Construction industry | 4.3% |
| Manufacturing sector | 9.5% |
| Financial & insurance services | 1.8% |
| Wholesale & retail services | 11.0% |
| Public administration | 2.6% |
| Transportation, warehousing & utilities | 3.5% |
| Education, health & social services | 11.0% |
| Other | 18.3% |
| City | Population | Household Income | National Avg. |
| Sainte-Anne-de-Sorel, QC | 2,758 | $93,131 | 13.0% |
| L'Assomption, QC | 23,628 | $86,248 | 4.6% |
| Saint-Sulpice, QC | 3,511 | $85,700 | 4.0% |
| Saint-Paul, QC | 6,280 | $83,807 | 1.7% |
| Lavaltrie, QC | 14,339 | $81,749 | 0.8% |
| Saint-Thomas, QC | 3,364 | $74,331 | 9.8% |
| City | Population | Household Income | National Avg. |
| Carthage, NY | 3,364 | n/a | |
| Shannondale, WV | 3,364 | n/a | |
| Corunna, MI | 3,363 | n/a | |
| Heyburn, ID | 3,365 | n/a | |
| Westway, TX | 3,365 | n/a | |
| Saint-Thomas, QC | 3,364 | $74,331 | 9.8% |