| ZIP Code | ZIP Code City/Town | ZIP Type | Average Adjusted Income(2021) |
|---|
| Lebanon | Standard | $352,880 |
| North Franklin | Standard | $342,330 |
| New London | Standard | $379,620 |
| Baltic | Standard | $289,120 |
| East Lyme | Standard | $415,430 |
| Bozrah | Standard | $349,710 |
| Gales Ferry | Standard | $308,780 |
| Ledyard | Standard | $335,980 |
| Groton | Standard | $407,380 |
| Jewett City | Standard | $373,960 |
| Montville | Standard | $141,350 |
| Mystic | Standard | $448,190 |
| Niantic | Standard | $417,480 |
| North Stonington | Standard | $337,050 |
| Norwich | Standard | $347,950 |
| Preston | Standard | $313,130 |
| Oakdale | Standard | $319,970 |
| Old Lyme | Standard | $630,780 |
| Quaker Hill | Standard | $332,030 |
| Stonington | Standard | $574,970 |
| Pawcatuck | Standard | $380,700 |
| Taftville | Standard | $149,970 |
| Uncasville | Standard | $294,060 |
| Voluntown | Standard | $353,130 |
| Waterford | Standard | $423,800 |
| Yantic | Standard | $112,750 |
| Colchester | Standard | $326,180 |
| Salem | Standard | $329,010 |
Source: US Internal Revenue Service