| Index | Cornwall | Ontario | National | 
| Cost of living | 81 | 111 | 100 | 
| Goods & Services | 105 | 107 | 100 | 
| Groceries | 101 | 101 | 100 | 
| Health care | 102 | 103 | 100 | 
| Housing | 29 | 120 | 100 | 
| Transportation | 100 | 104 | 100 | 
| Utilities | 107 | 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 | Cornwall | National avg. | Difference | 
| Personal Care | $100.00 | $94.33 | 6.0% | 
| Recreation | $101.00 | $102.33 | 1.3% | 
| Item | Cornwall | National avg. | Difference | 
| Meat, Poultry and Fish | $101.00 | $102.27 | 1.2% | 
| Dairy Products and Eggs | $100.00 | $104.67 | 4.5% | 
| Bakery and Cereal Products | $102.00 | $111.67 | 8.7% | 
| Fruit and Vegetables | $99.00 | $113.40 | 12.7% | 
| Alcoholic Beverages | $102.00 | $105.80 | 3.6% | 
| Item | Cornwall | National avg. | Difference | 
| Doctor | $104.00 | $101.07 | 2.9% | 
| Item | Cornwall | National avg. | Difference | 
| Home Price ($) | $411,201.00 | $659,395.00 | 37.6% | 
| Apartment Rent ($) | $1,156.00 | $2,146.00 | 46.1% | 
| Item | Cornwall | National avg. | Difference | 
| Gasoline | $98.00 | $102.07 | 4.0% | 
| Item | Cornwall | National avg. | Difference | 
| All Electricity | $105.00 | $98.60 | 6.5% | 
| 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. | 
| Roswell, NM | 47,751 | n/a | |
| Covina, CA | 47,787 | n/a | |
| Dublin, OH | 47,824 | n/a | |
| Minot, ND | 47,834 | n/a | |
| Chesterfield, MO | 47,603 | n/a | |
| Cornwall, ON | 47,736 | 81 | 18.8% |