| Index | Southwold | Ontario | National |
| Cost of living | 111 | 113 | 100 |
| Groceries | 115 | 110 | 100 |
| Health care | 106 | 104 | 100 |
| Housing | 106 | 123 | 100 |
| Transportation | 105 | 104 | 100 |
| Utilities | 132 | 121 | 100 |
| Lifestyle & Entertainment | n/a | n/a | n/a |
| Household Items | n/a | n/a | n/a |
| Education & Childcare | n/a | n/a | n/a |
| Cost of living index | |
| Groceries index | |
| Health care index | |
| Housing index | |
| Transportation index | |
| Utilities index | |
| Lifestyle index | |
| Household index | |
| Educare index |
| State | General Sales Tax | With Max Surtax |
| Ontario | 8% | 13% |
| State | Income Tax (Low) | Income Tax (High) |
| Ontario | 5.05% | 13.16% |
| City | Population | Cost of Living Index | National Avg. |
| Chippewas of the Thames First Nation 42, ON | 866 | 108 | 8.5% |
| Dutton/Dunwich, ON | 4,136 | 109 | 8.7% |
| Munsee-Delaware Nation 1, ON | 166 | 109 | 9.4% |
| St. Thomas, ON | 42,918 | 110 | 10.2% |
| Central Elgin, ON | 13,549 | 111 | 10.6% |
| Southwold, ON | 4,540 | 111 | 10.9% |
| City | Population | Cost of Living Index | National Avg. |
| Carolina Shores, NC | 4,539 | n/a | |
| Hurstbourne, KY | 4,541 | n/a | |
| Springville, AL | 4,542 | n/a | |
| Parker, FL | 4,542 | n/a | |
| Church Point, LA | 4,542 | n/a | |
| Southwold, ON | 4,540 | 111 | 10.9% |