| Index | Cornwall | Ontario | National |
| Cost of living | 81 | 111 | 100 |
| Goods & Services | 102 | 106 | 100 |
| Groceries | 105 | 110 | 100 |
| Health care | 101 | 104 | 100 |
| Housing | 29 | 120 | 100 |
| Transportation | 102 | 104 | 100 |
| Utilities | 110 | 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 | Cornwall | National avg. | Difference |
| Personal Care | $101.00 | $95.07 | 6.2% |
| Recreation | $100.00 | $101.73 | 1.7% |
| Item | Cornwall | National avg. | Difference |
| Meat, Poultry and Fish | $100.00 | $102.47 | 2.4% |
| Dairy Products and Eggs | $101.00 | $106.00 | 4.7% |
| Bakery and Cereal Products | $101.00 | $111.87 | 9.7% |
| Fruit and Vegetables | $105.00 | $112.87 | 7.0% |
| Alcoholic Beverages | $102.00 | $106.80 | 4.5% |
| Item | Cornwall | National avg. | Difference |
| Doctor | $101.00 | $101.07 | 0.1% |
| Item | Cornwall | National avg. | Difference |
| Home Price ($) | $411,201.00 | $659,395.00 | 37.6% |
| Apartment Rent ($) | $1,156.00 | $2,146.00 | 46.1% |
| Item | Cornwall | National avg. | Difference |
| Gasoline | $93.00 | $102.53 | 9.3% |
| Item | Cornwall | National avg. | Difference |
| All Electricity | $105.00 | $98.80 | 6.3% |
| City | Population | Cost of Living Index | National Avg. |
| Dundee, QC | 367 | 73 | 26.7% |
| Akwesasne (Part) 59, ON | 1,866 | 83 | 17.1% |
| North Stormont, ON | 7,196 | 83 | 16.5% |
| South Stormont, ON | 14,401 | 84 | 15.7% |
| South Glengarry, ON | 13,573 | 76 | 23.6% |
| Cornwall, ON | 47,736 | 81 | 18.8% |
| City | Population | Cost of Living Index | National Avg. |
| Littleton, CO | 47,719 | n/a | |
| Bothell, WA | 47,762 | n/a | |
| Four Corners, FL | 47,768 | n/a | |
| Everett, MA | 47,660 | n/a | |
| Hattiesburg, MS | 47,823 | n/a | |
| Cornwall, ON | 47,736 | 81 | 18.8% |