| Index | Plympton-Wyoming | Ontario | National |
| Cost of living | 94 | 111 | 100 |
| Goods & Services | 108 | 107 | 100 |
| Groceries | 100 | 101 | 100 |
| Health care | 103 | 103 | 100 |
| Housing | 58 | 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 | Plympton-Wyoming | National avg. | Difference |
| Personal Care | $102.00 | $94.33 | 8.1% |
| Recreation | $99.00 | $102.33 | 3.3% |
| Item | Plympton-Wyoming | 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 | Plympton-Wyoming | National avg. | Difference |
| Doctor | $104.00 | $101.07 | 2.9% |
| Item | Plympton-Wyoming | National avg. | Difference |
| Home Price ($) | $n/a | $659,395.00 | 100.0% |
| Apartment Rent ($) | $n/a | $2,146.00 | 100.0% |
| Item | Plympton-Wyoming | National avg. | Difference |
| Gasoline | $99.00 | $102.07 | 3.0% |
| Item | Plympton-Wyoming | 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% |
| Brooke-Alvinston, ON | 2,469 | 89 | 11.1% |
| Point Edward, ON | 2,173 | 89 | 10.9% |
| Sarnia, ON | 74,477 | 89 | 10.7% |
| Plympton-Wyoming, ON | 8,517 | 94 | 6.1% |
| City | Population | Cost of Living Index | National Avg. |
| Malverne, NY | 8,516 | n/a | |
| Cumberland Hill, RI | 8,515 | n/a | |
| Park Hills, MO | 8,512 | n/a | |
| Boonton, NJ | 8,510 | n/a | |
| Indian Harbour Beach, FL | 8,509 | n/a | |
| Plympton-Wyoming, ON | 8,517 | 94 | 6.1% |