| Index | Southold | New York | National |
| Cost of living | 163 | 121 | 100 |
| Groceries | 104 | 106 | 100 |
| Health care | 112 | 110 | 100 |
| Housing | 286 | 144 | 100 |
| Transportation | 109 | 113 | 100 |
| Utilities | 109 | 112 | 100 |
| Lifestyle & Entertainment | 115 | 111 | 100 |
| Household Items | 108 | 106 | 100 |
| Education & Childcare | 122 | 118 | 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 | $128,485 | $10,707 | $2,998 | $3,855 |
| Renters | $0 | $0 | $0 | $0 |
| State | General Sales Tax | With Max Surtax |
| New York | 4% | 8.875% |
| State | Income Tax (Low) | Income Tax (High) |
| New York | 4% | 10.9% |
| City | Population | Cost of Living Index | National Avg. |
| Dering Harbor, NY | 0 | 110 | 10.2% |
| Riverside village, NY | 634 | 93 | 6.8% |
| Northville village, NY | 1,040 | 101 | 0.9% |
| Clinton, CT | 3,418 | 119 | 18.9% |
| Flanders, NY | 5,277 | 131 | 30.7% |
| Southold, NY | 6,075 | 163 | 62.9% |
| City | Population | Cost of Living Index | National Avg. |
| Sainte-Martine, QC | 6,075 | n/a | |
| Morris Plains, NJ | 6,076 | 162 | 62.4% |
| Littlefield, TX | 6,076 | 84 | 16.0% |
| Kingston, TN | 6,077 | 94 | 5.9% |
| Hidden Valley Lake, CA | 6,072 | 137 | 36.7% |
| Southold, NY | 6,075 | 163 | 62.9% |