Alphabetical list of Connecticut planning regions
The land-area figures are rounded to the nearest square mile. Water area is shown separately so large lakes or coastal waters do not obscure the comparison.
| Name | FIPS code | Land area | Water area |
|---|---|---|---|
| Capitol Planning Region | 09110 | 1,027 sq mi | 19 sq mi |
| Greater Bridgeport Planning Region | 09120 | 140 sq mi | 98 sq mi |
| Lower Connecticut River Valley Planning Region | 09130 | 424 sq mi | 93 sq mi |
| Naugatuck Valley Planning Region | 09140 | 413 sq mi | 9 sq mi |
| Northeastern Connecticut Planning Region | 09150 | 554 sq mi | 9 sq mi |
| Northwest Hills Planning Region | 09160 | 787 sq mi | 21 sq mi |
| South Central Connecticut Planning Region | 09170 | 367 sq mi | 252 sq mi |
| Southeastern Connecticut Planning Region | 09180 | 598 sq mi | 84 sq mi |
| Western Connecticut Planning Region | 09190 | 532 sq mi | 116 sq mi |
Largest Connecticut planning regions by land area
These are the five largest mapped units in Connecticut by Census-reported land area:
- Capitol Planning Region — 1,027 square miles
- Northwest Hills Planning Region — 787 square miles
- Southeastern Connecticut Planning Region — 598 square miles
- Northeastern Connecticut Planning Region — 554 square miles
- Western Connecticut Planning Region — 532 square miles
How to read and use this map
County lines are administrative boundaries, not postal routes. A mailing address can use a city name associated with a neighboring area, and ZIP codes can cross county lines. When you need to identify a county for an address, confirm it with an official geocoder or local government source.
For classroom or planning use, print directly from this page. If labels become crowded, choose landscape orientation and reduce page margins. The underlying vector lines remain crisp at different sizes.
Frequently asked questions
How many planning regions are in Connecticut?
Connecticut has 9 planning regions in the U.S. Census Bureau’s 2025 cartographic boundary file.
Can I print this Connecticut county map?
Yes. Choose Print map and use landscape orientation for the widest map. Because the map is SVG, its boundary lines stay sharp when scaled.
Are these legal survey boundaries?
No. This is a generalized reference map. Property, parcel, election, and legal boundary questions should be checked with the relevant state or local agency.
Map source
U.S. Census Bureau, 2025 Cartographic Boundary File, Counties, 1:20,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 15, 2026.