| Index | L'Islet | Quebec | National |
| Cost of living | 85 | 88 | 100 |
| Groceries | 109 | 109 | 100 |
| Health care | 102 | 102 | 100 |
| Housing | 65 | 74 | 100 |
| Transportation | 101 | 101 | 100 |
| Utilities | 82 | 82 | 100 |
| Lifestyle & Entertainment | n/a | n/a | n/a |
| Household Items | n/a | n/a | n/a |
| Education & Childcare | n/a | n/a | n/a |
| Cost of living index | |
| Groceries index | |
| Health care index | |
| Housing index | |
| Transportation index | |
| Utilities index | |
| Lifestyle index | |
| Household index | |
| Educare index |
| State | General Sales Tax | With Max Surtax |
| Quebec | 9.975% | 14.975% |
| State | Income Tax (Low) | Income Tax (High) |
| Quebec | 15% | 25.75% |
| City | Population | Cost of Living Index | National Avg. |
| Saint-Damase-de-L'Islet, QC | 529 | 85 | 14.9% |
| Saint-Pierre-de-la-Rivière-du-Sud, QC | 880 | 85 | 14.9% |
| Saint-Marcel, QC | 412 | 86 | 14.4% |
| Saint-Jean-Port-Joli, QC | 3,441 | 86 | 14.1% |
| Saint-Antoine-de-l'Isle-aux-Grues, QC | 140 | 86 | 14.1% |
| L'Islet, QC | 3,712 | 85 | 14.8% |
| City | Population | Cost of Living Index | National Avg. |
| Imlay City, MI | 3,711 | n/a | |
| Barnegat, NJ | 3,713 | n/a | |
| Mullica Hill, NJ | 3,713 | n/a | |
| Wheatland, CA | 3,710 | n/a | |
| River Road, NC | 3,709 | n/a | |
| L'Islet, QC | 3,712 | 85 | 14.8% |