| Index | Old Mystic | Connecticut | National |
| Cost of living | 119 | 118 | 100 |
| Groceries | 107 | 106 | 100 |
| Health care | 109 | 111 | 100 |
| Housing | 146 | 139 | 100 |
| Transportation | 105 | 107 | 100 |
| Utilities | 107 | 108 | 100 |
| Lifestyle & Entertainment | 110 | 110 | 100 |
| Household Items | 103 | 106 | 100 |
| Education & Childcare | 113 | 116 | 100 |

| Cost of living index | |
| Groceries index | |
| Health care index | |
| Housing index | |
| Transportation index | |
| Utilities index | |
| Lifestyle index | |
| Household index | |
| Educare index |
| Median Income | Per Year | Per Month | Max Budget (28% DTI) | Max Budget (36% DTI) |
| Owners | $152,602 | $12,717 | $3,560 | $4,579 |
| Renters | $88,921 | $7,410 | $2,075 | $2,668 |
| State | General Sales Tax | With Max Surtax |
| Connecticut | 6.35% | 6.35% |
| State | Income Tax (Low) | Income Tax (High) |
| Connecticut | 3% | 6.99% |
| City | Population | Cost of Living Index | National Avg. |
| Fishers Island, NY | 63 | 107 | 7.4% |
| Hopkinton, RI | 628 | 102 | 2.1% |
| Poquonock Bridge, CT | 1,701 | 105 | 4.5% |
| Norwich, CT | 40,661 | 105 | 5.1% |
| Oxoboxo River, CT | 2,855 | 106 | 6.0% |
| Old Mystic, CT | 3,409 | 119 | 19.1% |
| City | Population | Cost of Living Index | National Avg. |
| Long Prairie, MN | 3,409 | 89 | 11.1% |
| Hartford, SD | 3,408 | 95 | 5.3% |
| Winnsboro, TX | 3,408 | 87 | 12.8% |
| Robbinsville, NJ | 3,410 | 138 | 37.8% |
| Lindsborg, KS | 3,411 | 91 | 8.6% |
| Old Mystic, CT | 3,409 | 119 | 19.1% |