Connecticut counties and planning regions
Connecticut has 9 planning regions. Find yours from your location, or explore the map and the full list with seats, population, time zones and FIPS codes.
Updated · Data: U.S. Census Bureau
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Connecticut has 9 planning regions, home to about 3,598,348 people. Sort the table by any column, or search by name or seat.
Planning regions9Eastern time
Most peopleCapitol Planning Region969,029 residents, 27% of the state
Fewest peopleNortheastern Connecticut Planning Region95,829 residents
Most crowdedGreater Bridgeport Planning Region2,327 people per sq mi
Largest by landCapitol Planning Region1,027.4 sq mi
Priciest homesWestern Connecticut Planning Regionmedian value $625,400
Connecticut planning region map
Population96k96k113k175k326k452k567kno data
Planning region explorer: all 9 planning regions in Connecticut
| Planning region | Seat | Population | Land sq mi | People / sq mi | Median home | Time zone | FIPS |
|---|---|---|---|---|---|---|---|
| Capitol | - | 969,029 | 1,027.4 | 943 | $298,200 | Eastern | 09110 |
| Western Connecticut | - | 621,232 | 532.1 | 1,168 | $625,400 | Eastern | 09190 |
| South Central Connecticut | - | 566,803 | 367.3 | 1,543 | $328,300 | Eastern | 09170 |
| Naugatuck Valley | - | 452,303 | 412.8 | 1,096 | $290,800 | Eastern | 09140 |
| Greater Bridgeport | - | 326,296 | 140.2 | 2,327 | $397,000 | Eastern | 09120 |
| Southeastern Connecticut | - | 279,025 | 598.1 | 467 | $293,900 | Eastern | 09180 |
| Lower Connecticut River Valley | - | 174,983 | 424.1 | 413 | $359,000 | Eastern | 09130 |
| Northwest Hills | - | 112,848 | 786.6 | 143 | $311,700 | Eastern | 09160 |
| Northeastern Connecticut | - | 95,829 | 553.9 | 173 | $281,300 | Eastern | 09150 |
Connecticut's 8 historical counties
Current Census files divide Connecticut into 9 planning regions, the state's Councils of Governments, instead of its 8 historical counties. Older datasets, records and forms may still use the county names, so both are worth knowing. The regions are groups of towns and do not follow the old county lines: 7 of the 8 counties have towns in more than one region.
Historical countyPlanning region (today)
| Historical county | Old FIPS | Towns | Residents | Land (sq mi) | Planning regions today |
|---|---|---|---|---|---|
| Fairfield County | 09001 | 23 | 959,099 | 625 | Western Connecticut (16 towns), Greater Bridgeport (6 towns), Naugatuck Valley (1 town) |
| Hartford County | 09003 | 29 | 895,736 | 735 | Capitol (26 towns), Northwest Hills (2 towns), Naugatuck Valley (1 town) |
| Litchfield County | 09005 | 26 | 185,732 | 921 | Northwest Hills (19 towns), Naugatuck Valley (5 towns), Western Connecticut (2 towns) |
| Middlesex County | 09007 | 15 | 164,983 | 369 | Lower Connecticut River Valley (15 towns) |
| New Haven County | 09009 | 27 | 862,028 | 604 | South Central Connecticut (15 towns), Naugatuck Valley (12 towns) |
| New London County | 09011 | 21 | 267,707 | 665 | Southeastern Connecticut (18 towns), Lower Connecticut River Valley (2 towns), Northeastern Connecticut (1 town) |
| Tolland County | 09013 | 13 | 146,907 | 410 | Capitol (12 towns), Northeastern Connecticut (1 town) |
| Windham County | 09015 | 15 | 116,156 | 513 | Northeastern Connecticut (14 towns), Southeastern Connecticut (1 town) |
Residents are the sum of each county's towns in ACS 2019-2023 estimates (3,598,348 in all); land is the towns' land area in TIGER/Line 2024. Our county finder shows both: the planning region and, for any point in Connecticut, the historical county.
Which towns are in each Connecticut county?
All 169 towns by historical county, with the planning region each belongs to today.
Fairfield County (23 towns)
- Bethel Western Connecticut
- Bridgeport Greater Bridgeport
- Brookfield Western Connecticut
- Danbury Western Connecticut
- Darien Western Connecticut
- Easton Greater Bridgeport
- Fairfield Greater Bridgeport
- Greenwich Western Connecticut
- Monroe Greater Bridgeport
- New Canaan Western Connecticut
- New Fairfield Western Connecticut
- Newtown Western Connecticut
- Norwalk Western Connecticut
- Redding Western Connecticut
- Ridgefield Western Connecticut
- Shelton Naugatuck Valley
- Sherman Western Connecticut
- Stamford Western Connecticut
- Stratford Greater Bridgeport
- Trumbull Greater Bridgeport
- Weston Western Connecticut
- Westport Western Connecticut
- Wilton Western Connecticut
Hartford County (29 towns)
- Avon Capitol
- Berlin Capitol
- Bloomfield Capitol
- Bristol Naugatuck Valley
- Burlington Northwest Hills
- Canton Capitol
- East Granby Capitol
- East Hartford Capitol
- East Windsor Capitol
- Enfield Capitol
- Farmington Capitol
- Glastonbury Capitol
- Granby Capitol
- Hartford Capitol
- Hartland Northwest Hills
- Manchester Capitol
- Marlborough Capitol
- New Britain Capitol
- Newington Capitol
- Plainville Capitol
- Rocky Hill Capitol
- Simsbury Capitol
- South Windsor Capitol
- Southington Capitol
- Suffield Capitol
- West Hartford Capitol
- Wethersfield Capitol
- Windsor Capitol
- Windsor Locks Capitol
Litchfield County (26 towns)
- Barkhamsted Northwest Hills
- Bethlehem Naugatuck Valley
- Bridgewater Western Connecticut
- Canaan Northwest Hills
- Colebrook Northwest Hills
- Cornwall Northwest Hills
- Goshen Northwest Hills
- Harwinton Northwest Hills
- Kent Northwest Hills
- Litchfield Northwest Hills
- Morris Northwest Hills
- New Hartford Northwest Hills
- New Milford Western Connecticut
- Norfolk Northwest Hills
- North Canaan Northwest Hills
- Plymouth Naugatuck Valley
- Roxbury Northwest Hills
- Salisbury Northwest Hills
- Sharon Northwest Hills
- Thomaston Naugatuck Valley
- Torrington Northwest Hills
- Warren Northwest Hills
- Washington Northwest Hills
- Watertown Naugatuck Valley
- Winchester Northwest Hills
- Woodbury Naugatuck Valley
Middlesex County (15 towns)
- Chester Lower Connecticut River Valley
- Clinton Lower Connecticut River Valley
- Cromwell Lower Connecticut River Valley
- Deep River Lower Connecticut River Valley
- Durham Lower Connecticut River Valley
- East Haddam Lower Connecticut River Valley
- East Hampton Lower Connecticut River Valley
- Essex Lower Connecticut River Valley
- Haddam Lower Connecticut River Valley
- Killingworth Lower Connecticut River Valley
- Middlefield Lower Connecticut River Valley
- Middletown Lower Connecticut River Valley
- Old Saybrook Lower Connecticut River Valley
- Portland Lower Connecticut River Valley
- Westbrook Lower Connecticut River Valley
New Haven County (27 towns)
- Ansonia Naugatuck Valley
- Beacon Falls Naugatuck Valley
- Bethany South Central Connecticut
- Branford South Central Connecticut
- Cheshire Naugatuck Valley
- Derby Naugatuck Valley
- East Haven South Central Connecticut
- Guilford South Central Connecticut
- Hamden South Central Connecticut
- Madison South Central Connecticut
- Meriden South Central Connecticut
- Middlebury Naugatuck Valley
- Milford South Central Connecticut
- Naugatuck Naugatuck Valley
- New Haven South Central Connecticut
- North Branford South Central Connecticut
- North Haven South Central Connecticut
- Orange South Central Connecticut
- Oxford Naugatuck Valley
- Prospect Naugatuck Valley
- Seymour Naugatuck Valley
- Southbury Naugatuck Valley
- Wallingford South Central Connecticut
- Waterbury Naugatuck Valley
- West Haven South Central Connecticut
- Wolcott Naugatuck Valley
- Woodbridge South Central Connecticut
New London County (21 towns)
- Bozrah Southeastern Connecticut
- Colchester Southeastern Connecticut
- East Lyme Southeastern Connecticut
- Franklin Southeastern Connecticut
- Griswold Southeastern Connecticut
- Groton Southeastern Connecticut
- Lebanon Southeastern Connecticut
- Ledyard Southeastern Connecticut
- Lisbon Southeastern Connecticut
- Lyme Lower Connecticut River Valley
- Montville Southeastern Connecticut
- New London Southeastern Connecticut
- North Stonington Southeastern Connecticut
- Norwich Southeastern Connecticut
- Old Lyme Lower Connecticut River Valley
- Preston Southeastern Connecticut
- Salem Southeastern Connecticut
- Sprague Southeastern Connecticut
- Stonington Southeastern Connecticut
- Voluntown Northeastern Connecticut
- Waterford Southeastern Connecticut
Tolland County (13 towns)
- Andover Capitol
- Bolton Capitol
- Columbia Capitol
- Coventry Capitol
- Ellington Capitol
- Hebron Capitol
- Mansfield Capitol
- Somers Capitol
- Stafford Capitol
- Tolland Capitol
- Union Northeastern Connecticut
- Vernon Capitol
- Willington Capitol
Windham County (15 towns)
- Ashford Northeastern Connecticut
- Brooklyn Northeastern Connecticut
- Canterbury Northeastern Connecticut
- Chaplin Northeastern Connecticut
- Eastford Northeastern Connecticut
- Hampton Northeastern Connecticut
- Killingly Northeastern Connecticut
- Plainfield Northeastern Connecticut
- Pomfret Northeastern Connecticut
- Putnam Northeastern Connecticut
- Scotland Northeastern Connecticut
- Sterling Northeastern Connecticut
- Thompson Northeastern Connecticut
- Windham Southeastern Connecticut
- Woodstock Northeastern Connecticut
Sources: Census TIGER/Line 2024; ACS 2019-2023 5-year; Wikidata, CC0 (seats); timezone-boundary-builder (time zones). Data as of November 1, 2026. Not affiliated with any government agency.
FAQ
Frequently asked questions
How many counties are in Connecticut?
8 historical counties. Current Census files use 9 planning regions instead, as county equivalents.
Does Connecticut still have counties?
The 8 counties remain as names and in older records, but current Census files count Connecticut by its 9 planning regions. Our finder shows both; see the historical counties.
What county is Hartford, CT in?
Hartford County (historical county); today's Census files put the town of Hartford in the Capitol Planning Region.
What were the old Connecticut county FIPS codes?
Fairfield County 09001, Hartford County 09003, Litchfield County 09005, Middlesex County 09007, New Haven County 09009, New London County 09011, Tolland County 09013, Windham County 09015.
What is the most populated planning region in Connecticut?
Capitol Planning Region, with about 969,029 people (27% of the state).
What is the least populated planning region in Connecticut?
Northeastern Connecticut Planning Region, with about 95,829 people.
What is the largest planning region in Connecticut by land?
Capitol Planning Region, 1,027.4 sq mi of land.
What planning region am I in, in Connecticut?
Use the tool at the top of this page: press Use my current location, or type your city or ZIP code.