| Index | St. Clair | Ontario | National |
| Cost of living | 109 | 113 | 100 |
| Groceries | 115 | 110 | 100 |
| Health care | 106 | 104 | 100 |
| Housing | 99 | 123 | 100 |
| Transportation | 105 | 104 | 100 |
| Utilities | 132 | 121 | 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 |
| Ontario | 8% | 13% |
| State | Income Tax (Low) | Income Tax (High) |
| Ontario | 5.05% | 13.16% |
| City | Population | Cost of Living Index | National Avg. |
| Enniskillen, ON | 2,704 | 108 | 8.2% |
| Petrolia, ON | 6,108 | 109 | 8.8% |
| Sarnia 45, ON | 627 | 111 | 10.6% |
| Oil Springs, ON | 698 | 111 | 11.1% |
| St. Clair, ON | 14,919 | 109 | 9.0% |
| City | Population | Cost of Living Index | National Avg. |
| North Auburn, CA | 14,919 | n/a | |
| Fort Campbell North, KY | 14,915 | n/a | |
| Roanoke Rapids, NC | 14,926 | n/a | |
| Colesville, MD | 14,928 | n/a | |
| Sterling, CO | 14,909 | n/a | |
| St. Clair, ON | 14,919 | 109 | 9.0% |