| Index | Saint-Thomas-Didyme | Quebec | National |
| Median household income | $58,059 | $72,311 | $82,436 |
| Unemployment rate | 5.5% | 3.7% | 6.4% |
| In labour force | 46.8% | 64.3% | 63.9% |
| Labour Type | Percent |
| Construction industry | 3.5% |
| Manufacturing sector | 7.2% |
| Financial & insurance services | 1.8% |
| Wholesale & retail services | 6.3% |
| Public administration | 2.0% |
| Transportation, warehousing & utilities | 1.8% |
| Education, health & social services | 1.2% |
| Other | 21.0% |
| City | Population | Household Income | National Avg. |
| Girardville, QC | 925 | $69,958 | 15.1% |
| Normandin, QC | 2,956 | $67,904 | 17.6% |
| La Doré, QC | 1,316 | $62,779 | 23.8% |
| Saint-Edmond-les-Plaines, QC | 372 | $58,994 | 28.4% |
| Saint-Thomas-Didyme, QC | 661 | $58,059 | 29.6% |
| City | Population | Household Income | National Avg. |
| Paxton, FL | 661 | n/a | |
| Troy, IN | 661 | n/a | |
| The Lakes, MN | 661 | n/a | |
| Clinton, MT | 661 | n/a | |
| Virginia City, NV | 661 | n/a | |
| Saint-Thomas-Didyme, QC | 661 | $58,059 | 29.6% |