List of county routes in Suffolk County, New York


County routes in Suffolk County, New York are maintained by the Suffolk County Department of Public Works and signed with the Manual on Uniform Traffic Control Devices-standard yellow-on-blue pentagon route marker. The designations do not follow any fixed pattern. Some route numbers are deliberately omitted in order to alleviate confusion with New York state routes ; however, this practice is inconsistent, as other numbers including 108, 111, and 112 are duplicated. These routes are officially logged inside the New York State Department of Transportation's "Local Highway Inventory", which lists all county routes for each county in the State of New York.

Routes 1–25

RouteLength
Length
FromViaToNotes
NY 27A in AmityvilleCounty Line RoadJoyce Avenue in East Farmingdale-
NY 110 in AmityvilleDixon Avenue, Straight Path, & Seaman Neck RoadNY 231 in Half Hollow Hills-
NY 110 in AmityvilleDixon AvenueNY 27 in CopiagueFormer number; now part of CR 2
Perry Street in North LindenhurstWellwood Avenue and Pinelawn RoadWalt Whitman Road in MelvilleSouthern terminus is at the Lindenhurst village line.-
NY 231 in Deer ParkCommack Road & Townline RoadClay Pitts Road in Commack-
NY 110 in MelvilleRuland Road & Colonial Springs RoadTown of Huntington/Town of Babylon town line in MelvilleUnsigned and unrecognized by the SCDPW-
CR 108Rabro Drive in HauppaugeNY 111Serves Hauppauge Industrial Park and Suffolk County government buildings-
CR 13Wicks Road in BrentwoodCR 67-
I-495 / CR 101 in YaphankYaphank BypassCR 21 in Middle IslandUnbuilt route
NY 25A in HuntingtonGreenlawn Road & Cuba Hill RoadCR 10 in ElwoodUnsigned and unrecognized by the SCDPW-
NY 25 in ElwoodElwood RoadNY 25A in Northport-
NY 108 in Cold Spring HarborPulaski Road & East Northport RoadNY 25A in Kings Park-
CR 86 in GreenlawnPulaski RoadCR 10 in [East Northport, New York|Northport, New York|East Northport]Former number; now part of CR 11
NY 110 in Huntington StationPulaski RoadCR 86 in GreenlawnFormer number; now part of CR 11
NY 108 in Cold Spring HarborPulaski RoadNY 110 in Huntington StationFormer number; now part of CR 11
CR 1 in AmityvilleOak Street, Hoffman Avenue, & Railroad AvenueCR 96 in West BabylonFormerly CR 50B. Eastern terminus at Babylon village line.-
NY 27A in Bay ShoreFifth Avenue and Crooked Hill RoadCR 4 in CommackSegment between West Main Street and Clinton Street in Bay Shore is northbound only. Southbound only segment is Clinton Street.-
CR 13Clinton Avenue in Bay ShoreNY 27ASouthbound only segment of CR 13; formerly CR 53-
NY 25 in CommackIndian Head RoadNY 25A in Kings Park-
NY 111 in HauppaugeMaple AvenueNY 25 / NY 25A in SmithtownWas unsigned and unrecognized by the SCDPW. No longer recognized by NYSDOT.-
NY 25 in Village of the BranchTerry Road, Smithtown Boulevard, Lake Shore Road, Portion Road, and Horseblock RoadCR 80 in South Haven-
NY 27A in East IslipCarleton Avenue and Wheeler RoadNY 111 in HauppaugeFormer alignment of NY 111 before 1966-
CR 85 in SayvilleBroadway AvenueCR 19 in HolbrookWas unsigned and unrecognized by the SCDPW. No longer recognized by NYSDOT.-
CR 65 in PatchogueWest Avenue, Lake Street, Waverly Avenue, Patchogue–Holbrook Road, & Patchogue RoadCR 16 in Ronkonkoma-
CR 18Main Street in HolbrookCR 19Former segment of CR 19 through Holbrook.-
NY 25A in Port JeffersonNorth Country RoadNY 25A in Sound BeachOnce included Lower Sheep Pasture and Sheep Pasture roads; Was unsigned and unrecognized by the SCDPW. No longer recognized by NYSDOT.-
CR 80 in BrookhavenYaphank Avenue, Main Street, Yaphank–Middle Island Road, and Rocky Point RoadNY 25A in Rocky PointDiscontinuous at Sunrise Highway in Brookhaven.-
CR 21 / CR 56Horseblock Road Extension in BrookhavenCR 80Former number; now part of CR 16
NY 25 in JamesportManor LaneSound Avenue in NorthvilleWas unsigned and unrecognized by the SCDPW. No longer recognized by NYSDOT.-
NY 25 in AquebogueChurch LaneSound Avenue in NorthvilleWas unsigned and unrecognized by the SCDPW. No longer recognized by NYSDOT.
CR 21 in Middle IslandLongwood RoadCR 46 in UptonFormer number.
CR 80 in [Center Moriches, New York|Moriches, New York|Center Moriches]Railroad Avenue, Wading River-Center Moriches Road, North Country Road, Sound RoadLong Island Sound in Wading RiverFormer number; realigned section was planned between I-495 exit 69 and west end of CR 80 and CR 98

Routes 26–50C

RouteLength
Length
FromViaToNotes
NY 25 in MattituckNew Suffolk Lane and New Suffolk RoadNY 25 in CutchogueNo longer recognized by SCDPW or NYSDOT.
NY 25 Truck in MattituckMiddle RoadNY 25 in GreenportFormer number; now part of CR 48
NY 25 TruckMiddle Road in MattituckWickham AvenueFormer number; now part of CR 48
Wickham AvenueNew Middle Road in MattituckWickham Avenue near Elijah's LaneFormer number; now part of CR 48
NY 27 in North LindenhurstNew Highway and Republic RoadCR 5 in MelvilleGap in route between Southern State Parkway and Babylon/Huntington town line.-
CR 93 in BohemiaSmithtown Avenue and Ronkonkoma AvenueI-495 in RonkonkomaServed as a connector from the Long Island Expressway to Ronkonkoma Station (LIRR) and Long Island MacArthur Airport. No longer recognized by SCDPW or NYSDOT.
NY 27East Lake Drive in MontaukBlock Island SoundServed as a connector from New York State Route 27 to Montauk Airport. No longer recognized by SCDPW or NYSDOT.
CR 80 in Westhampton BeachOld Riverhead RoadCR 104 in Riverside-
Dune RoadPonquogue Bridge in Hampton BaysLighthouse RoadServes Ponquogue Bridge over Shinnecock Bay. Unsigned route. Used to extend northward to Montauk Highway via Foster Avenue, Shinnecock Road, & Ponquogue Avenue.-
Good Ground RoadPonquogue Avenue in Hampton BaysCR 80Former number; was part of CR 32.
CR 89Foster Avenue, Ponquogue Bridge in Hampton BaysLighthouse RoadFormer number; was part of CR 32
NY 27 in AmagansettCranberry Hole Road, Promised Land Road, Lazy Point RoadNY 27 in NapeagueServed Napeague. No longer recognized from SCDPW or NYSDOT.
CR 45 in AmagansettAbrahams Landing RoadCR 32 in NapeagueFormer number; was part of CR 74.
Village Line Road Town of BabylonDeer Park AvenueNY 231 in Deer ParkSouthern terminus is at the Babylon village line.-
Northern State Parkway / NY 231 / CR 66 in Dix HillsDeer Park Road, Park Avenue, & West Shore RoadLanding Road in HuntingtonServes Gold Star Beach Park in Huntington.-
NY 25A in HuntingtonPark Avenue, Sabbath Day PathNY 110 in HalesiteFormer number; now part of CR 35
CR 35 in Dix HillsDeer Park Road EastNY 25 in ElwoodFormer number; now CR 66
NY 110 in HalesiteMill Dam Road, West Shore RoadWest Neck Road near Lloyd HarborFormer number; became part of CR 35
CR 80 in East PatchogueSouth Country RoadCR 80 in BrookhavenFormer segment of Montauk Highway. Serves Bellport.-
NY 114Manwaring Road in Shelter Island HeightsShelter Island SoundFormer route.
NY 27 / CR 39 / CR 39A in SouthamptonNorth Sea Road500 feet north of Millstone Brook Road in North Sea.Serves the hamlet of North Sea. Used to extend from North Sea to Sag Harbor.-
CR 38 in NoyackNoyack–Long Beach RoadNY 114 in North HavenFormer number; now CR 60
CR 80 in Shinnecock HillsNorth Road & North HighwayNY 27 / CR 39A at David Whites Lane in SouthamptonMost of the route overlaps with NY 27. Eastbound gap at Sunrise Highway terminus.-
NY 27 / CR 39 at David Whites LaneFlying Point Road in SouthamptonNY 27 at Hampton Road and Montauk HighwayEntire length overlaps with NY 27. Signed as CR 39.-
CR 39 / NY 27Canal Road East and Old North Highway in Shinnecock HillsCR 39 / NY 27Former segment of CR 39 along Shinnecock Canal. Serves Meschutt Beach County Park.-
Cedar Street in East Hampton NorthThree Mile Harbor RoadCopeces Lane in SpringsSouthern terminus is on East Hampton village line.-
Three Mile Harbor RoadFormer number; now part of CR 40
CR 40 in East Hampton NorthSprings–Fireplace RoadWoodbine Drive in Springs-
Rocky Point AvenueShore Road in Shelter Island HeightsCR 115-
CR 73 in RiverheadNorthville TurnpikeSound Avenue in Northville-
NY 114 in North HavenNorth Haven SpurNY 114 in Shelter IslandUnbuilt route; was to include South Shelter Island Bridge
NY 27 in AmagansettAmagansett–Springs RoadCR 40 in SpringsNo longer recognized by SCDPW or NYSDOT.
CR 75 in Smith Point County ParkWilliam Floyd ParkwayNY 25A in East ShorehamServes Smith Point County Park and Brookhaven National Laboratory. Was proposed to be an extension of Interstate 91 south from Connecticut in the 1970s.-
Moriches–Middle Island Road in East YaphankWilliam Floyd ParkwaySouth of NY 25 in RidgeFormer number; now part of CR 46
NY 27A in CopiagueGreat Neck Road & Main StreetNassau County line in North Amityville-
NY 25 Truck in MattituckMiddle RoadNY 25 in GreenportEntire length overlaps with NY 25 Truck. The western terminus is 1000 feet west of Cox Neck Road.-
NY 27Edgemere Street and Flamingo Avenue in MontaukCR 77-
NY 109 in BabylonPark Avenue, Deer Park Avenue, Simon Street, John Street, & Union BoulevardNY 27A in Great RiverUnsigned from NY 109 to CR 82.-
CR 85 in OakdaleUnion Boulevard ExtensionCR 85 in SayvilleFormerly proposed eastern extension of CR 50
NY 110 in AmityvilleOak Street, Hoffman Avenue, and Trolley Line RoadCR 34 in BabylonFormer number; now CR 12
NY 109 in West BabylonPark AvenueCR 34 in BabylonFormerly proposed western extension of CR 50

Routes 51–75

RouteLength
Length
FromViaToNotes
CR 80 in East MorichesEast Moriches–Riverhead Road & Center Drive SouthNY 24 / CR 94 in RiversideServes Suffolk County Center - Riverhead.-
NY 27 / CR 39Sandy Hollow Road in TuckahoeCR 38-
NY 27AClinton Avenue in Bay ShoreCR 13Former number; now CR 13A
Sound AvenueHulse Landing Road in Wading RiverWildwood State ParkOnce extended south to NY 25A.-
CR 80Eastport–Manor Road in EastportCR 51Originally extended northwest to I-495 exit 70. New signage implemented by NYSDOT on Interstate 495 at the Halsey Manor Road bridge shows a CR 55 shield for the road indicator signs.-
CR 16 in BrookhavenVictory AvenueCR 46 in ShirleyServes Southaven County Park.-
NY 231 in Deer ParkBay Shore Road, Howells Road, Roosevelt Street, and Third AvenueCR 50 in Islip-
CR 57Third Avenue in Bay ShoreNY 27AFormer number; now part of CR 57
CR 57Third Avenue in Bay ShoreNY 27Former number
NY 25 in RiverheadOld Country RoadNY 25 in Aquebogue-
East Hampton village lineLong Lane in East Hampton NorthStephen Hands PathOriginally planned to run from NY 27 to NY 114 as a realignment of the latter.-
Noyack-Sag Harbor Road in NoyackNoyack–Long Beach Road and Short Beach RoadNY 114 in North HavenFormerly CR 38A-
CR 19Waverly Avenue in HoltsvilleCR 99 WB Exit RampRoute is unsigned. Serves Internal Revenue Service location in Holtsville.-
CR 80Newtown Road in Canoe PlaceShinnecock CanalServes Shinnecock County Marina.-
CR 51 in Wildwood LakeLake Avenue & Peconic AvenueNY 25 in RiverheadFormer segment of CR 51. Peconic Avenue portion unsigned from CR 94/CR 104/NY 24 to NY 25.-
CR 36 in BellportBellport Avenue and Station and Mill roadsNY 112 in CoramNo longer recognized by SCDPW or NYSDOT. Designation formerly used for Long Island Avenue between CR 101 and CR 21.
CR 85 in SayvilleMiddle Road, Atlantic Avenue, Weeks Street, River Avenue, and Division StreetCR 19 in Patchogue-
CR 35 in Dix HillsDeer Park Road EastNY 25 in ElwoodFormerly CR 35B-
Half Hollow Road in HuntingtonLong Island Motor ParkwayCR 93 in Lake RonkonkomaUsed to include Half Hollow Road in Dix Hills.-
CR 3Half Hollow Road in Dix HillsNY 231Former number; became part of CR 67 west of Long Island Motor Parkway.
NY 25A in Stony BrookMain Street, Christian Avenue, Bailey Hollow Road, and Ridgeway AvenueNY 25A in SetauketRidgeway Avenue portion was once part of NY 25A. Route no longer recognized by SCDPW or NYSDOT.
NY 114 in South Shelter IslandCartwright RoadRam Island Road in Shelter Island-
NY 27 in MontaukSouth Lake DriveCR 77 in Montauk LakeFormer number.
CR 80Old Country Road in EastportWesthampton Beach village line in Southampton-
CR 80 in WesthamptonMill RoadOneck Lane on the Westhampton Beach village lineRoute is unsigned.-
CR 80Atlantic Avenue in East MorichesMoriches BayFormer number
NY 25Roanoke Avenue in RiverheadCR 58Signs approaching the roundabout from Old Country Road to Roanoke Avenue say the route continues north from CR 58, but no CR 73 shields exist north of the roundabout.-
CR 58 in RiverheadRoanoke AvenueSound Avenue in RoanokeFormer number; was part of CR 73.
NY 27 in AmagansettPromised Land Road ExtensionNY 27 in East Hampton BeachUnbuilt route; was to replace much of CR 33
CR 46 in Fire Island National SeashoreFire Island Beach RoadToll booth at Smith Point County ParkFormerly proposed segment of Ocean Parkway. Used to be signed, but all signs have been removed.-

Routes 76–100

RouteLength
Length
FromViaToNotes
NY 347 in HauppaugeTownline RoadNichols Road in NesconsetRuns along the Islip–Smithtown town line-
NY 27West Lake Drive in MontaukCR 49Route loops back to intersect itself and CR 49 at northern terminus.-
NY 27Fern Street in MontaukCR 77 / CR 77BFormer number; now part of CR 77
NY 27Old West Lake Drive in MontaukCR 77 / CR 77AFormer number
NY 27 north of BayportChurch Street and Kennedy AvenueCR 80 in PatchogueOriginally included Veterans Memorial Highway. No longer recognized by SCDPW or NYSDOT.
NY 27 in BridgehamptonBridgehampton–Sag Harbor TurnpikeBrick Kiln Road in Sag HarborRoute used to extend north to NY 114 in downtown Sag Harbor.-
Sag Harbor village lineMain StreetBrick Kiln Road in Sag HarborFormer number; now part of CR 79
Patchogue village line at Bay AvenueMontauk HighwayNY 900W at Knoll Road in SouthamptonFormerly part of NY 27A-
NY 114Wharf Street Extension in Sag HarborSag Harbor CoveWas the shortest county road in Suffolk County; former segment of the LIRR Sag Harbor Branch. No longer recognized by SCDPW or NYSDOT.
NY 27AHigbie Lane and Udall Road in West IslipNY 27-
Patchogue village line at Howard AvenueNorth Ocean Avenue and Patchogue–Mount Sinai RoadNY 25A in Mount Sinai-
CR 83 extension in Miller PlaceCedar Beach Spur ParkwayCedar Beach Town Park in Mount SinaiUnbuilt route
Sound Avenue in MattituckCox Neck and Mill roadsNY 25 in East MattituckFormer route.
NY 27 in OakdaleMontauk Highway0.07 miles west of CR 19 in PatchogueFormerly part of NY 27A-
NY 25 in South HuntingtonBroadway Greenlawn and Centerport RoadNY 25A in CenterportWas to be replaced by part of unbuilt CR 107. Route unsigned north of LIRR railroad tracks in Greenlawn-
NY 25 / NY 25A in SmithtownEdgewood AvenueNY 25A in Saint JamesNo longer recognized by SCDPW & NYSDOT.
CR 71 in SpeonkRiverhead–Speonk RoadCR 51 near Wildwood LakeNo longer recognized by SCDPW & NYSDOT. Served Suffolk County Community College Eastern Campus in Northampton
0.91 miles east of Westhampton Beach village lineDune Road in Westhampton Beach0.14 miles east of Jessup Lane-
CR 97 southbound rampFurrows Road in HoltsvilleWaverly AvenuePart of formerly proposed Central Suffolk Highway, route is unsigned.-
I-495 exit 70 in ManorvilleManorville Branch RoadCR 71 / CR 80 in EastportWas to be built on former LIRR Manorville Branch
NY 25 in West HillsOakwood Road and High StreetNY 110 in Huntington-
NY 27 exit 49 in SayvilleLakeland, Ocean, and Rosevale avenuesCR 16 in Lake Ronkokoma-
River Road in CalvertonEdwards Avenue, Nugent Drive, & Center DriveCR 63 / CR 104 in RiverheadOverlaps NY 24 from I-495 to eastern terminus.-
NY 24 / CR 94 in RiversideCenter Drive SpurNY 25 in RiverheadShortest signed route in Suffolk County. Only signed on CR 94.-
NY 109 in West BabylonLittle East Neck and Colonial Spring roadsCR 3 in MelvilleNo longer recognized by SCDPW or NYSDOT.
Great South Bay in LindenhurstBergen Avenue and Great East Neck RoadNY 109 in West BabylonUnsigned route.-
CR 85 near Blue PointNicolls RoadNY 25A in Stony Brook-
CR 80 in MorichesFrowein Road or Moriches BypassCR 80 in East MorichesFormerly co-designated as NY 27A Truck-
CR 19 in HoltsvilleWoodside AvenueCR 16 in Brookhaven-
CR 13 in BrentwoodSuffolk AvenueNY 454 in IslandiaWas intended to be extended westward to NY 24 and NY 110 in East Farmingdale-

Routes 101 and up

RouteLength
Length
FromViaToNotes
CR 80 in East PatchogueSills Road & Patchogue–Yaphank RoadLong Island Avenue in YaphankIncludes an unbuilt extension to CR 46 in Upton-
CR 21 in YaphankEast Main Street ExtensionI-495 exit 68 / CR 46 in East YaphankUnbuilt route
CR 51Cedar Swamp Road in RiverheadCR 58 or I-495Unbuilt route
CR 80 in QuogueQuogue-Riverhead Road & Riverleigh AvenueNY 24 / CR 63 / CR 94 in RiversideFormerly NY 113-
CR 80 in East QuogueOakville and Lewis roadsCR 104 in OakvilleFormer number
CR 104 in FlandersCross River DriveSound Avenue in NorthvilleIncludes an unbuilt western extension to CR 111 in Manorville-
CR 13Community College Drive in BrentwoodCR 7Originally a local road within the grounds of Pilgrim State Psychiatric Center. Route unsigned.-
CR 50C in West BabylonWest Babylon–Centerport RoadNY 25A in CenterportUnbuilt route.
CR 67Old Willets Path in HauppaugeCR 6Unsigned route.-
CR 97 in CentereachA.O. Smith TurnpikeNY 25A in PoquottUnbuilt route; also intended to lead to a bridge between Port Jefferson and Bridgeport, Connecticut
NY 27 in EastportCaptain Daniel Roe Highway I-495 in ManorvilleOriginally intended to run from NY 25A in Mount Sinai to CR 89 in Westhampton Beach-
NY 27Johnson Avenue in BohemiaNY 454 at Long Island MacArthur AirportUnsigned route; not to be confused with NY 112.-
NY 27 in GeorgicaStephen Hands PathNY 114 in HardscrabbleNo longer recognized by SCDPW or NYSDOT. All signs have been removed.
CR 42 in Shelter IslandWest Neck RoadNY 114 in Shelter Island Heights-
Midway RoadSmith Street & Menantic Road in Shelter IslandCR 115-
Ram Island RoadBurns Avenue in Shelter IslandCR 69-