How to use this list
Counties are sorted alphabetically. Use ZIP count and population to spot larger counties, then open a county for its ZIP roster and income/housing averages.
Connecticut counties
8 counties · 288 ZIP codes · population 3,598,348 . Select a county to open its ZIP table and local summary.
Related pages
Also see the Connecticut overview, cities, rankings, and congressional districts.
| County | ZIP codes | Population | Avg. income |
|---|---|---|---|
| Fairfield County | 46 | 959,116 | $144,255 |
| Hartford County | 60 | 896,078 | $108,143 |
| Litchfield County | 40 | 185,373 | $103,163 |
| Middlesex County | 23 | 164,337 | $110,007 |
| New Haven County | 41 | 862,028 | $96,293 |
| New London County | 33 | 269,015 | $104,257 |
| Tolland County | 16 | 146,664 | $112,750 |
| Windham County | 29 | 115,737 | $89,605 |
Frequently asked questions
- How many counties are listed for Connecticut?
- US5 currently lists 8 counties with published ZIP coverage in Connecticut. Counts can change as geography publishes update.
- What happens when I open a county?
- Each county page shows ZIP totals, income and housing averages, and a ZIP table. From there you can open any ZIP for a full demographics dashboard.