List of counties in Connecticut

Those offices and their departments were abolished by an act of the state legislature effective in December 2000.According to the Census Bureau, "Connecticut's COGs/Planning Regions have the authority to carry out administrative functions that are typically found among counties in other states.[7] The United States Census Bureau formally recognized the planning regions/councils of government as county equivalents in the Federal Register on June 6, 2022.A draft notice of potential recognition would have adapted the existing FIPS codes for the eight "legacy counties", however in response to submitted comments, the bureau retired the codes and assigned new ones to more clearly illustrate the break in geographic continuity.The bureau notes that the recognition of planning regions as county equivalents was unique to the specific conditions in Connecticut, and would not constitute a binding precedent on similar conditions in other states.
Map of the counties of colonial Connecticut , 1766.
Comparison of county boundaries to planning regions [ 8 ]
State of ConnecticutWindhamFairfieldMiddlesexLitchfieldCounty governmentcensus designated placecolonial ConnecticutcountiesU.S. stateConnecticutConnecticut ColonyNew Haven Colonylocal government in ConnecticutConnecticut Department of CorrectionsUnited States Census BureauCouncils of Governmentsplanning regions/councils of governmentcounty equivalentsFederal RegisterFairfield CountyBridgeportHartford CountyHartfordHertfordEnglandLitchfield CountyLichfieldStaffordshireMiddlesex CountyMiddletownNew Haven CountyNew HavenPuritansNew London CountyNew LondonLondonTolland CountyRockvilleTollandSomersetWindham CountyWillimanticWinehamSussexWymondhamNorfolkTrumbull CountyConnecticut Western ReserveWestmoreland County, ConnecticutWilkes-BarrePennsylvaniaG. P. Putnam's SonsWayback MachineLists of United States counties and county equivalentsStatesAlabamaAlaskaArizonaArkansasCaliforniaColoradoequiv.DelawareFloridaGeorgiaHawaiiIllinoisIndianaKansasKentuckyLouisianaMarylandMassachusettsMichiganMinnesotaMississippiMissouriMontanaNebraskaNevadaNew HampshireNew JerseyNew MexicoNew YorkNorth CarolinaNorth DakotaOklahomaOregonRhode IslandSouth CarolinaSouth DakotaTennesseeVermontVirginiaWashingtonWest VirginiaWisconsinWyomingFederal districtDistrict of ColumbiaInsular areasAmerican SamoaPuerto RicoU.S. Virgin IslandsOutlying IslandsTopicsConstitutionDelegationsElectionsHistoryPeopleSymbolsAbortionClimate changeEducationGun lawsLGBT rightsParty strengthCoastal ConnecticutFarmington ValleyGold CoastGreater BridgeportGreater DanburyGreater HartfordTri-State areaConnecticut panhandleGreater New HavenHousatonic ValleyLitchfield HillsLower Connecticut River ValleyCentral Naugatuck ValleyNaugatuck River ValleyQuiet CornerSoutheastern ConnecticutPlanning regionsCapitolNaugatuck ValleyNortheastern ConnecticutNorthwest HillsSouth Central ConnecticutWestern ConnecticutCitiesAnsoniaBristolDanburyGrotonMeridenMilfordNew BritainNorwalkNorwichSheltonStamfordTorringtonWaterburyWest HavenAll townsAndoverAshfordBarkhamstedBeacon FallsBerlinBethanyBethelBethlehemBloomfieldBoltonBozrahBranfordBridgewaterBrookfieldBrooklynBurlingtonCanaanCanterburyCantonChaplinCheshireChesterClintonColchesterColebrookColumbiaCornwallCoventryCromwellDarienDeep RiverDurhamEast GranbyEast HaddamEast HamptonEast HartfordEast HavenEast LymeEast WindsorEastfordEastonEllingtonEnfieldFarmingtonFranklinGlastonburyGoshenGranbyGreenwichGriswoldGuilfordHaddamHamdenHamptonHartlandHarwintonHebronKillinglyKillingworthLebanonLedyardLisbonMadisonManchesterMansfieldMarlboroughMiddleburyMiddlefieldMonroeMontvilleMorrisNaugatuckNew CanaanNew FairfieldNew HartfordNew MilfordNewingtonNewtownNorth BranfordNorth CanaanNorth HavenNorth StoningtonOld LymeOld SaybrookOrangeOxfordPlainfieldPlainvillePlymouthPomfretPortlandPrestonProspectPutnamReddingRidgefieldRocky HillRoxburySalisburyScotlandSeymourSharonShermanSimsburySomersSouth WindsorSouthburySouthingtonSpragueStaffordSterlingStoningtonStratfordSuffieldThomastonThompsonTrumbullVernonVoluntownWallingfordWarrenWaterfordWatertownWest HartfordWestbrookWestonWestportWethersfieldWillingtonWiltonWinchesterWindsorWindsor LocksWolcottWoodbridgeWoodburyWoodstockBoroughs