| Index | St. Catharines | Ontario | National |
| Cost of living | 91 | 111 | 100 |
| Goods & Services | 110 | 106 | 100 |
| Groceries | 115 | 110 | 100 |
| Health care | 106 | 104 | 100 |
| Housing | 50 | 120 | 100 |
| Transportation | 105 | 104 | 100 |
| Utilities | 132 | 121 | 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 | St. Catharines | National avg. | Difference |
| Personal Care | $103.00 | $95.07 | 8.3% |
| Recreation | $98.00 | $101.73 | 3.7% |
| Item | St. Catharines | National avg. | Difference |
| Meat, Poultry and Fish | $96.00 | $102.47 | 6.3% |
| Dairy Products and Eggs | $103.00 | $106.00 | 2.8% |
| Bakery and Cereal Products | $99.00 | $111.87 | 11.5% |
| Fruit and Vegetables | $99.00 | $112.87 | 12.3% |
| Alcoholic Beverages | $106.00 | $106.80 | 0.7% |
| Item | St. Catharines | National avg. | Difference |
| Doctor | $105.00 | $101.07 | 3.9% |
| Item | St. Catharines | National avg. | Difference |
| Home Price ($) | $609,000.00 | $659,395.00 | 7.6% |
| Apartment Rent ($) | $1,913.00 | $2,146.00 | 10.9% |
| Item | St. Catharines | National avg. | Difference |
| Gasoline | $102.00 | $102.53 | 0.5% |
| Item | St. Catharines | National avg. | Difference |
| All Electricity | $105.00 | $98.80 | 6.3% |
| City | Population | Cost of Living Index | National Avg. |
| Welland, ON | 56,929 | 89 | 11.1% |
| Thorold, ON | 21,396 | 91 | 8.7% |
| Niagara Falls, ON | 95,282 | 91 | 8.6% |
| Lincoln, ON | 27,082 | 96 | 4.4% |
| Pelham, ON | 18,077 | 99 | 1.4% |
| St. Catharines, ON | 140,913 | 91 | 8.6% |
| City | Population | Cost of Living Index | National Avg. |
| West Valley City, UT | 140,970 | n/a | |
| Cambridge, ON | 140,221 | 94 | 6.0% |
| Metairie, LA | 141,877 | n/a | |
| Milton, ON | 142,128 | 105 | 4.6% |
| Waco, TX | 142,208 | n/a | |
| St. Catharines, ON | 140,913 | 91 | 8.6% |