| Index | Sarnia | Ontario | National | 
| Cost of living | 89 | 111 | 100 | 
| Goods & Services | 108 | 107 | 100 | 
| Groceries | 100 | 101 | 100 | 
| Health care | 103 | 103 | 100 | 
| Housing | 43 | 120 | 100 | 
| Transportation | 107 | 104 | 100 | 
| Utilities | 130 | 119 | 100 | 
| Cost of living index | |
| Goods & Services index | |
| Groceries index | |
| Health care index | |
| Housing index | |
| Transportation index | |
| Utilities index | 
| State | General Sales Tax | With Max Surtax | 
| Ontario | 8% | 13% | 
| State | Income Tax (Low) | Income Tax (High) | 
| Ontario | 5.05% | 13.16% | 
| Item | Sarnia | National avg. | Difference | 
| Personal Care | $102.00 | $94.33 | 8.1% | 
| Recreation | $99.00 | $102.33 | 3.3% | 
| Item | Sarnia | National avg. | Difference | 
| Meat, Poultry and Fish | $99.00 | $102.27 | 3.2% | 
| Dairy Products and Eggs | $101.00 | $104.67 | 3.5% | 
| Bakery and Cereal Products | $97.00 | $111.67 | 13.1% | 
| Fruit and Vegetables | $98.00 | $113.40 | 13.6% | 
| Alcoholic Beverages | $102.00 | $105.80 | 3.6% | 
| Item | Sarnia | National avg. | Difference | 
| Doctor | $104.00 | $101.07 | 2.9% | 
| Item | Sarnia | National avg. | Difference | 
| Home Price ($) | $509,082.00 | $659,395.00 | 22.8% | 
| Apartment Rent ($) | $1,298.00 | $2,146.00 | 39.5% | 
| Item | Sarnia | National avg. | Difference | 
| Gasoline | $99.00 | $102.07 | 3.0% | 
| Item | Sarnia | National avg. | Difference | 
| All Electricity | $106.00 | $98.60 | 7.5% | 
| City | Population | Cost of Living Index | National Avg. | 
| Petrolia, ON | 6,108 | 88 | 12.1% | 
| Sarnia 45, ON | 627 | 89 | 11.3% | 
| Point Edward, ON | 2,173 | 89 | 10.9% | 
| Enniskillen, ON | 2,704 | 92 | 8.3% | 
| Plympton-Wyoming, ON | 8,517 | 94 | 6.1% | 
| Sarnia, ON | 74,477 | 89 | 10.7% | 
| City | Population | Cost of Living Index | National Avg. | 
| Buckeye, AZ | 74,467 | n/a | |
| Rock Hill, SC | 74,410 | n/a | |
| Rancho Cordova, CA | 74,394 | n/a | |
| Rochester Hills, MI | 74,340 | n/a | |
| Bolingbrook, IL | 74,319 | n/a | |
| Sarnia, ON | 74,477 | 89 | 10.7% |