| Index | Saint-Marc-du-Lac-Long | Quebec | National |
| Median household income | $50,606 | $72,311 | $82,436 |
| Unemployment rate | 4.6% | 3.7% | 6.4% |
| In labour force | 51.5% | 64.3% | 63.9% |
| Labour Type | Percent |
| Construction industry | 4.0% |
| Manufacturing sector | 16.5% |
| Financial & insurance services | 0.0% |
| Wholesale & retail services | 4.0% |
| Public administration | 4.3% |
| Transportation, warehousing & utilities | 0.0% |
| Education, health & social services | 9.5% |
| Other | 10.3% |
| City | Population | Household Income | National Avg. |
| Clair, NB | 281 | $89,581 | 8.7% |
| Saint-Eusèbe, QC | 576 | $75,941 | 7.9% |
| Saint-François, NB | 614 | $72,706 | 11.8% |
| Lac Baker, NB | 691 | $61,959 | 24.8% |
| Packington, QC | 600 | $60,744 | 26.3% |
| Saint-Marc-du-Lac-Long, QC | 370 | $50,606 | 38.6% |
| City | Population | Household Income | National Avg. |
| Naknek, AK | 370 | n/a | |
| Beaverville, IL | 370 | n/a | |
| Mount Clare, IL | 370 | n/a | |
| Royal, IL | 370 | n/a | |
| Shelby, IN | 370 | n/a | |
| Saint-Marc-du-Lac-Long, QC | 370 | $50,606 | 38.6% |