Connecticut Counties Directory & Interactive Map
Complete official guide to all 9 counties in Connecticut (CT). Explore 2024 US Census population estimates, county seats, FIPS codes, land areas, and interactive mapping tools powered by GeoMap Suite.
Connecticut County Breakdown
Showing 9 of 9 documented counties and seats.
County Name | FIPS | County Seat | Population (Census) | Land Area | Quick Tool |
|---|---|---|---|---|---|
| Capitol Planning Region | 09110 | Hartford | 976,248 | 1,018 sq mi | Lookup |
| Western Connecticut Planning Region | 09190 | Stamford / Danbury | 623,690 | 601 sq mi | Lookup |
| South Central Connecticut Planning Region | 09170 | New Haven | 570,487 | 608 sq mi | Lookup |
| Naugatuck Valley Planning Region | 09140 | Waterbury | 450,376 | 410 sq mi | Lookup |
| Greater Bridgeport Planning Region | 09120 | Bridgeport | 325,778 | 145 sq mi | Lookup |
| Southeastern Connecticut Planning Region | 09180 | Norwich | 280,430 | 569 sq mi | Lookup |
| Lower Connecticut River Valley Planning Region | 09130 | Middletown | 176,197 | 433 sq mi | Lookup |
| Northwest Hills Planning Region | 09160 | Torrington | 112,504 | 785 sq mi | Lookup |
| Northeastern Connecticut Planning Region | 09150 | Killingly | 96,196 | 565 sq mi | Lookup |
Geographic Structure of Connecticut Counties
County Administration & Governance
In Connecticut, county governments manage vital public infrastructure, tax assessments, law enforcement, judicial courts, election administration, and public records. The county seat (Hartford and other municipal headquarters) houses the primary courthouse, commissioners, and sheriff’s department.
All Connecticut counties carry a unique 5-digit Federal Information Processing Standard (FIPS) code, where the first two digits (09) designate the state and the remaining three digits identify each specific jurisdiction.
Geographic & Demographic Highlights
- Most Populous County:Capitol Planning Region (976,248 residents)
- Largest by Land Area:Capitol Planning Region (1,018 sq mi)
- State Capital:Hartford
- Census Bureau Region:Northeast United States
Demographic calculations derive from the United States Census Bureau 2024 Population Estimates Program (PEP) and TIGER/Line geographic boundary files.