# 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 (SCDPW) 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 (such as CR109 and CR114); 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

| Route | Length (mi) | Length (km) | From | Via | To | Notes |
| CR 1 | 1.54 | 2.48 | NY 27A in Amityville | County Line Road | Joyce Avenue in East Farmingdale | |
| CR 2 | 8.53 | 13.73 | NY 110 in Amityville | Dixon Avenue, Straight Path, & Seaman Neck Road | NY 231 in Half Hollow Hills | |
| CR 2A | | | NY 110 in Amityville | Dixon Avenue | NY 27 in Copiague | Former number; now part of CR 2 |
| CR 3 | 6.84 | 11.01 | Perry Street in North Lindenhurst | Wellwood Avenue and Pinelawn Road | Walt Whitman Road in Melville | Southern terminus is at the Lindenhurst village line. |
| CR 4 | 9.31 | 14.98 | NY 231 in Deer Park | Commack Road & Townline Road | Clay Pitts Road in Commack | |
| CR 5 | 1.78 | 2.86 | NY 110 in Melville | Ruland Road & Colonial Springs Road | Town of Huntington/Town of Babylon town line in Melville | Unsigned and unrecognized by the SCDPW |
| CR 6 | 0.86 | 1.38 | CR 108 | Rabro Drive in Hauppauge | NY 111 | Serves Hauppauge Industrial Park and Suffolk County government buildings |
| CR 7 | 1.75 | 2.82 | CR 13 | Wicks Road in Brentwood | CR 67 | |
| CR 8 | | | I-495 / CR 101 in Yaphank | Yaphank Bypass | CR 21 in Middle Island | Unbuilt route |
| CR 9 | 4.65 | 7.48 | NY 25A in Huntington | Greenlawn Road & Cuba Hill Road | CR 10 in Elwood | Unsigned and unrecognized by the SCDPW |
| CR 10 | 3.94 | 6.34 | NY 25 in Elwood | Elwood Road | NY 25A in Northport | |
| CR 11 | 11.21 | 18.04 | NY 108 in Cold Spring Harbor | Pulaski Road & East Northport Road | NY 25A in Kings Park | |
| CR 11A | | | CR 86 in Greenlawn | Pulaski Road | CR 10 in East Northport | Former number; now part of CR 11 |
| CR 11B | | | NY 110 in Huntington Station | Pulaski Road | CR 86 in Greenlawn | Former number; now part of CR 11 |
| CR 11C | | | NY 108 in Cold Spring Harbor | Pulaski Road | NY 110 in Huntington Station | Former number; now part of CR 11 |
| CR 12 | 4.45 | 7.16 | CR 1 in Amityville | Oak Street, Hoffman Avenue, & Railroad Avenue | CR 96 in West Babylon | Formerly CR 50B. Eastern terminus at Babylon village line. |
| CR 13 | 7.50 | 12.07 | NY 27A in Bay Shore | Fifth Avenue and Crooked Hill Road | CR 4 in Commack | Segment between West Main Street (NY 27A) and Clinton Street (CR 13A) in Bay Shore is northbound only. Southbound only segment is Clinton Street (CR 13A). |
| CR 13A | 0.65 | 1.05 | CR 13 | Clinton Avenue in Bay Shore | NY 27A | Southbound only segment of CR 13; formerly CR 53 |
| CR 14 | 3.22 | 5.18 | NY 25 in Commack | Indian Head Road | NY 25A in Kings Park | |
| CR 15 | 1.35 | 2.17 | NY 111 in Hauppauge | Maple Avenue | NY 25 / NY 25A in Smithtown | Was unsigned and unrecognized by the SCDPW. No longer recognized by NYSDOT. |
| CR 16 | 15.90 | 25.59 | NY 25 in Village of the Branch | Terry Road, Smithtown Boulevard, Lake Shore Road, Portion Road, and Horseblock Road | CR 80 in South Haven | |
| CR 17 | 5.53 | 8.90 | NY 27A in East Islip | Carleton Avenue and Wheeler Road | NY 111 in Hauppauge | Former alignment of NY 111 before 1966 |
| CR 18 | 3.90 | 6.28 | CR 85 in Sayville | Broadway Avenue | CR 19 in Holbrook | Was unsigned and unrecognized by the SCDPW. No longer recognized by NYSDOT. |
| CR 19 | 6.77 | 10.90 | CR 65 in Patchogue | West Avenue, Lake Street, Waverly Avenue, Patchogue–Holbrook Road, & Patchogue Road | CR 16 in Ronkonkoma | |
| CR 19A | 0.9 | 1.45 | CR 18 | Main Street in Holbrook | CR 19 | Former segment of CR 19 through Holbrook. |
| CR 20 | 6.60 | 10.62 | NY 25A in Port Jefferson | North Country Road | NY 25A in Sound Beach | Once included Lower Sheep Pasture and Sheep Pasture roads; Was unsigned and unrecognized by the SCDPW. No longer recognized by NYSDOT. |
| CR 21 | 11.70 | 18.83 | CR 80 in Brookhaven | Yaphank Avenue, Main Street, Yaphank–Middle Island Road, and Rocky Point Road | NY 25A in Rocky Point | Discontinuous at Sunrise Highway (NY 27) in Brookhaven. |
| CR 21A | | | CR 21 / CR 56 | Horseblock Road Extension in Brookhaven | CR 80 | Former number; now part of CR 16 |
| CR 22 | 2.45 | 3.94 | NY 25 in Jamesport | Manor Lane | Sound Avenue in Northville | Was unsigned and unrecognized by the SCDPW. No longer recognized by NYSDOT. |
| CR 23 | | | NY 25 in Aquebogue | Church Lane | Sound Avenue in Northville | Was unsigned and unrecognized by the SCDPW. No longer recognized by NYSDOT. |
| CR 24 | | | CR 21 in Middle Island | Longwood Road | CR 46 in Upton | Former number. |
| CR 25 | | | CR 80 in Center Moriches | Railroad Avenue, Wading River-Center Moriches Road, North Country Road, Sound Road | Long Island Sound in Wading River | Former number; realigned section was planned between I-495 exit 69 and west end of CR 80 and CR 98 |

## Routes 26–50C

| Route | Length (mi) | Length (km) | From | Via | To | Notes |
| CR 26 | | | NY 25 in Mattituck | New Suffolk Lane and New Suffolk Road | NY 25 in Cutchogue | No longer recognized by SCDPW or NYSDOT. |
| CR 27 | | | NY 25 Truck in Mattituck | Middle Road | NY 25 in Greenport | Former number; now part of CR 48 |
| CR 27A | | | NY 25 Truck | Middle Road in Mattituck | Wickham Avenue | Former number; now part of CR 48 |
| CR 27B | | | Wickham Avenue | New Middle Road in Mattituck | Wickham Avenue near Elijah's Lane | Former number; now part of CR 48 |
| CR 28 | 2.31 | 3.72 | NY 27 in North Lindenhurst | New Highway and Republic Road | CR 5 in Melville | Gap in route between Southern State Parkway and Babylon/Huntington town line. |
| CR 29 | | | CR 93 in Bohemia | Smithtown Avenue and Ronkonkoma Avenue | I-495 in Ronkonkoma | Served as a connector from the Long Island Expressway to Ronkonkoma Station (LIRR) and Long Island MacArthur Airport. No longer recognized by SCDPW or NYSDOT. |
| CR 30 | | | NY 27 | East Lake Drive in Montauk | Block Island Sound | Served as a connector from New York State Route 27 to Montauk Airport. No longer recognized by SCDPW or NYSDOT. |
| CR 31 | 4.02 | 6.47 | CR 80 in Westhampton Beach | Old Riverhead Road | CR 104 in Riverside | |
| CR 32 | 0.77 | 1.24 | Dune Road | Ponquogue Bridge in Hampton Bays | Lighthouse Road | Serves Ponquogue Bridge over Shinnecock Bay. Unsigned route. Used to extend northward to Montauk Highway via Foster Avenue, Shinnecock Road, & Ponquogue Avenue. |
| CR 32A | | | Good Ground Road | Ponquogue Avenue in Hampton Bays | CR 80 | Former number; was part of CR 32. |
| CR 32B | | | CR 89 | Foster Avenue, Ponquogue Bridge in Hampton Bays | Lighthouse Road | Former number; was part of CR 32 |
| CR 33 | | | NY 27 in Amagansett | Cranberry Hole Road, Promised Land Road, Lazy Point Road | NY 27 in Napeague | Served Napeague. No longer recognized from SCDPW or NYSDOT. |
| CR 33A | | | CR 45 in Amagansett | Abrahams Landing Road | CR 32 in Napeague | Former number; was part of CR 74. |
| CR 34 | 1.34 | 2.16 | Village Line Road Town of Babylon | Deer Park Avenue | NY 231 in Deer Park | Southern terminus is at the Babylon village line. |
| CR 35 | 7.04 | 11.33 | Northern State Parkway / NY 231 / CR 66 in Dix Hills | Deer Park Road, Park Avenue, & West Shore Road | Landing Road in Huntington | Serves Gold Star Beach Park in Huntington. |
| CR 35A | | | NY 25A in Huntington | Park Avenue, Sabbath Day Path | NY 110 in Halesite | Former number; now part of CR 35 |
| CR 35B | | | CR 35 in Dix Hills | Deer Park Road East | NY 25 in Elwood | Former number; now CR 66 |
| CR 35C | | | NY 110 in Halesite | Mill Dam Road, West Shore Road | West Neck Road near Lloyd Harbor | Former number; became part of CR 35 |
| CR 36 | 5.65 | 9.09 | CR 80 in East Patchogue | South Country Road | CR 80 in Brookhaven | Former segment of Montauk Highway. Serves Bellport. |
| CR 37 | | | NY 114 | Manwaring Road in Shelter Island Heights | Shelter Island Sound | Former route. |
| CR 38 | 2.53 | 4.07 | NY 27 / CR 39 / CR 39A in Southampton | North Sea Road | 500 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 38A | | | CR 38 in Noyack | Noyack–Long Beach Road | NY 114 in North Haven | Former number; now CR 60 |
| CR 39 | 6.71 | 10.80 | CR 80 in Shinnecock Hills | North Road & North Highway | NY 27 / CR 39A at David Whites Lane in Southampton | Most of the route overlaps with NY 27. Eastbound gap at Sunrise Highway terminus. |
| CR 39A | 0.62 | 1.00 | NY 27 / CR 39 at David Whites Lane | Flying Point Road in Southampton | NY 27 at Hampton Road and Montauk Highway | Entire length overlaps with NY 27. Signed as CR 39. |
| CR 39B | 0.73 | 1.17 | CR 39 / NY 27 | Canal Road East and Old North Highway in Shinnecock Hills | CR 39 / NY 27 | Former segment of CR 39 along Shinnecock Canal. Serves Meschutt Beach County Park. |
| CR 40 | 2.51 | 4.04 | Cedar Street in East Hampton North | Three Mile Harbor Road | Copeces Lane in Springs | Southern terminus is on East Hampton village line. |
| CR 40A | | | | Three Mile Harbor Road | | Former number; now part of CR 40 |
| CR 41 | 3.00 | 4.83 | CR 40 in East Hampton North | Springs–Fireplace Road | Woodbine Drive in Springs | |
| CR 42 | 1.20 | 1.93 | Rocky Point Avenue | Shore Road in Shelter Island Heights | CR 115 | |
| CR 43 | 3.43 | 5.52 | CR 73 in Riverhead | Northville Turnpike | Sound Avenue in Northville | |
| CR 44 | | | NY 114 in North Haven | North Haven Spur | NY 114 in Shelter Island | Unbuilt route; was to include South Shelter Island Bridge |
| CR 45 | | | NY 27 in Amagansett | Amagansett–Springs Road | CR 40 in Springs | No longer recognized by SCDPW or NYSDOT. |
| CR 46 | 15.37 | 24.74 | CR 75 in Smith Point County Park | William Floyd Parkway | NY 25A in East Shoreham | Serves Smith Point County Park and Brookhaven National Laboratory. Was proposed to be an extension of Interstate 91 south from Connecticut in the 1970s. |
| CR 46A | | | Moriches–Middle Island Road in East Yaphank | William Floyd Parkway | South of NY 25 in Ridge | Former number; now part of CR 46 |
| CR 47 | 3.77 | 6.07 | NY 27A in Copiague | Great Neck Road & Main Street | Nassau County line in North Amityville | |
| CR 48 | 13.60 | 21.89 | NY 25 Truck in Mattituck | Middle Road | NY 25 in Greenport | Entire length overlaps with NY 25 Truck. The western terminus is 1000 feet west of Cox Neck Road. |
| CR 49 | 2.84 | 4.57 | NY 27 | Edgemere Street and Flamingo Avenue in Montauk | CR 77 | |
| CR 50 | 9.93 | 15.98 | NY 109 in Babylon | Park Avenue, Deer Park Avenue, Simon Street, John Street, & Union Boulevard | NY 27A in Great River | Unsigned from NY 109 to CR 82 (Higbie Lane). |
| CR 50A | | | CR 85 in Oakdale | Union Boulevard Extension | CR 85 in Sayville | Formerly proposed eastern extension of CR 50 |
| CR 50B | | | NY 110 in Amityville | Oak Street, Hoffman Avenue, and Trolley Line Road | CR 34 in Babylon | Former number; now CR 12 |
| CR 50C | | | NY 109 in West Babylon | Park Avenue | CR 34 in Babylon | Formerly proposed western extension of CR 50 |

## Routes 51–75

| Route | Length (mi) | Length (km) | From | Via | To | Notes |
| CR 51 | 8.46 | 13.62 | CR 80 in East Moriches | East Moriches–Riverhead Road & Center Drive South | NY 24 / CR 94 in Riverside | Serves Suffolk County Center - Riverhead. |
| CR 52 | 0.88 | 1.42 | NY 27 / CR 39 | Sandy Hollow Road in Tuckahoe | CR 38 | |
| CR 53 | | | NY 27A | Clinton Avenue in Bay Shore | CR 13 | Former number; now CR 13A |
| CR 54 | 1.02 | 1.64 | Sound Avenue | Hulse Landing Road in Wading River | Wildwood State Park | Once extended south to NY 25A. |
| CR 55 | 0.96 | 1.54 | CR 80 | Eastport–Manor Road in Eastport | CR 51 | Originally 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 56 | 2.20 | 3.54 | CR 16 in Brookhaven | Victory Avenue | CR 46 in Shirley | Serves Southaven County Park. |
| CR 57 | 4.54 | 7.31 | NY 231 in Deer Park | Bay Shore Road, Howells Road, Roosevelt Street, and Third Avenue | CR 50 in Islip | |
| CR 57A | | | CR 57 | Third Avenue in Bay Shore | NY 27A | Former number; now part of CR 57 |
| CR 57B | | | CR 57 | Third Avenue in Bay Shore | NY 27 | Former number |
| CR 58 | 4.42 | 7.11 | NY 25 in Riverhead | Old Country Road | NY 25 in Aquebogue | |
| CR 59 | 1.16 | 1.87 | East Hampton village line | Long Lane in East Hampton North | Stephen Hands Path | Originally planned to run from NY 27 to NY 114 as a realignment of the latter. |
| CR 60 | 1.74 | 2.80 | Noyack-Sag Harbor Road in Noyack | Noyack–Long Beach Road and Short Beach Road | NY 114 in North Haven | Formerly CR 38A |
| CR 61 | 0.32 | 0.51 | CR 19 | Waverly Avenue in Holtsville | CR 99 WB Exit Ramp | Route is unsigned. Serves Internal Revenue Service location in Holtsville. |
| CR 62 | 0.89 | 1.43 | CR 80 | Newtown Road in Canoe Place | Shinnecock Canal | Serves Shinnecock County Marina. |
| CR 63 | 1.84 | 2.96 | CR 51 in Wildwood Lake | Lake Avenue & Peconic Avenue | NY 25 in Riverhead | Former segment of CR 51. Peconic Avenue portion unsigned from CR 94/CR 104/NY 24 to NY 25 (used to be a portion of NY 24). |
| CR 64 | | | CR 36 in Bellport | Bellport Avenue and Station and Mill roads | NY 112 in Coram | No longer recognized by SCDPW or NYSDOT. Designation formerly used for Long Island Avenue between CR 101 and CR 21. |
| CR 65 | 4.78 | 7.69 | CR 85 in Sayville | Middle Road, Atlantic Avenue, Weeks Street, River Avenue, and Division Street | CR 19 in Patchogue | |
| CR 66 | 0.92 | 1.48 | CR 35 in Dix Hills | Deer Park Road East | NY 25 in Elwood | Formerly CR 35B |
| CR 67 | 14.43 | 23.22 | Half Hollow Road in Huntington | Long Island Motor Parkway | CR 93 in Lake Ronkonkoma | Used to include Half Hollow Road in Dix Hills (CR 67A). |
| CR 67A | | | CR 3 | Half Hollow Road in Dix Hills | NY 231 | Former number; became part of CR 67 west of Long Island Motor Parkway. |
| CR 68 | | | NY 25A in Stony Brook | Main Street, Christian Avenue, Bailey Hollow Road, and Ridgeway Avenue | NY 25A in Setauket | Ridgeway Avenue portion was once part of NY 25A. Route no longer recognized by SCDPW or NYSDOT. |
| CR 69 | 1.43 | 2.30 | NY 114 in South Shelter Island | Cartwright Road | Ram Island Road in Shelter Island | |
| CR 70 | | | NY 27 in Montauk | South Lake Drive | CR 77 in Montauk Lake | Former number. |
| CR 71 | 0.49 | 0.79 | CR 80 | Old Country Road in Eastport | Westhampton Beach village line in Southampton | |
| CR 71 | 0.53 | 0.85 | CR 80 in Westhampton | Mill Road | Oneck Lane on the Westhampton Beach village line | Route is unsigned. |
| CR 72 | | | CR 80 | Atlantic Avenue in East Moriches | Moriches Bay | Former number |
| CR 73 | 1.27 | 2.04 | NY 25 | Roanoke Avenue in Riverhead | CR 58 | Signs approaching the roundabout from Old Country Road (CR 58) to Roanoke Avenue (CR 73) say the route continues north from CR 58, but no CR 73 shields exist north of the roundabout. |
| CR 73A | | | CR 58 in Riverhead | Roanoke Avenue | Sound Avenue in Roanoke | Former number; was part of CR 73. |
| CR 74 | | | NY 27 in Amagansett | Promised Land Road Extension | NY 27 in East Hampton Beach | Unbuilt route; was to replace much of CR 33 |
| CR 75 | 0.50 | 0.80 | CR 46 in Fire Island National Seashore | Fire Island Beach Road | Toll booth at Smith Point County Park | Formerly proposed segment of Ocean Parkway. Used to be signed, but all signs have been removed. |

## Routes 76–100

| Route | Length (mi) | Length (km) | From | Via | To | Notes |
| CR 76 | 3.25 | 5.23 | NY 347 in Hauppauge | Townline Road | Nichols Road in Nesconset | Runs along the Islip–Smithtown town line |
| CR 77 | 3.00 | 4.83 | NY 27 | West Lake Drive in Montauk | CR 49 | Route loops back to intersect itself and CR 49 at northern terminus. |
| CR 77A | | | NY 27 | Fern Street in Montauk | CR 77 / CR 77B | Former number; now part of CR 77 |
| CR 77B | | | NY 27 | Old West Lake Drive in Montauk | CR 77 / CR 77A | Former number |
| CR 78 | | | NY 27 north of Bayport | Church Street and Kennedy Avenue | CR 80 in Patchogue | Originally included Veterans Memorial Highway (NY 454). No longer recognized by SCDPW or NYSDOT. |
| CR 79 | 3.73 | 6.00 | NY 27 in Bridgehampton | Bridgehampton–Sag Harbor Turnpike | Brick Kiln Road in Sag Harbor | Route used to extend north to NY 114 in downtown Sag Harbor. |
| CR 79A | | | Sag Harbor village line | Main Street | Brick Kiln Road in Sag Harbor | Former number; now part of CR 79 |
| CR 80 | 32.50 | 52.30 | Patchogue village line at Bay Avenue | Montauk Highway | NY 900W at Knoll Road in Southampton | Formerly part of NY 27A |
| CR 81 | | | NY 114 | Wharf Street Extension in Sag Harbor | Sag Harbor Cove | Was the shortest county road in Suffolk County; former segment of the LIRR Sag Harbor Branch. No longer recognized by SCDPW or NYSDOT. |
| CR 82 | 1.62 | 2.61 | NY 27A | Higbie Lane and Udall Road in West Islip | NY 27 | |
| CR 83 | 11.53 | 18.56 | Patchogue village line at Howard Avenue | North Ocean Avenue and Patchogue–Mount Sinai Road | NY 25A in Mount Sinai | |
| CR 83A | | | CR 83 extension in Miller Place | Cedar Beach Spur Parkway | Cedar Beach Town Park in Mount Sinai | Unbuilt route |
| CR 84 | | | Sound Avenue in Mattituck | Cox Neck and Mill roads | NY 25 in East Mattituck | Former route. |
| CR 85 | 8.11 | 13.05 | NY 27 in Oakdale | Montauk Highway | 0.07 miles west of CR 19 in Patchogue | Formerly part of NY 27A |
| CR 86 | 3.85 | 6.20 | NY 25 in South Huntington | Broadway Greenlawn and Centerport Road | NY 25A in Centerport | Was to be replaced by part of unbuilt CR 107. Route unsigned north of LIRR railroad tracks in Greenlawn |
| CR 87 | | | NY 25 / NY 25A in Smithtown | Edgewood Avenue | NY 25A in Saint James | No longer recognized by SCDPW & NYSDOT. |
| CR 88 | | | CR 71 in Speonk | Riverhead–Speonk Road | CR 51 near Wildwood Lake | No longer recognized by SCDPW & NYSDOT. Served Suffolk County Community College Eastern Campus in Northampton |
| CR 89 | 1.18 | 1.90 | 0.91 miles east of Westhampton Beach village line | Dune Road in Westhampton Beach | 0.14 miles east of Jessup Lane | |
| CR 90 | 0.53 | 0.85 | CR 97 southbound ramp | Furrows Road in Holtsville | Waverly Avenue | Part of formerly proposed Central Suffolk Highway, route is unsigned. |
| CR 91 | | | I-495 exit 70 in Manorville | Manorville Branch Road | CR 71 / CR 80 in Eastport | Was to be built on former LIRR Manorville Branch |
| CR 92 | 2.89 | 4.65 | NY 25 in West Hills | Oakwood Road and High Street | NY 110 in Huntington | |
| CR 93 | 5.48 | 8.82 | NY 27 exit 49 in Sayville | Lakeland, Ocean, and Rosevale avenues | CR 16 in Lake Ronkokoma | |
| CR 94 | 4.58 | 7.37 | River Road in Calverton | Edwards Avenue, Nugent Drive, & Center Drive | CR 63 / CR 104 in Riverhead | Overlaps NY 24 from I-495 to eastern terminus. |
| CR 94A | 0.15 | 0.24 | NY 24 / CR 94 in Riverside | Center Drive Spur | NY 25 in Riverhead | Shortest signed route in Suffolk County. Only signed on CR 94. |
| CR 95 | | | NY 109 in West Babylon | Little East Neck and Colonial Spring roads | CR 3 in Melville | No longer recognized by SCDPW or NYSDOT. |
| CR 96 | 2.08 | 3.35 | Great South Bay in Lindenhurst | Bergen Avenue and Great East Neck Road | NY 109 in West Babylon | Unsigned route. |
| CR 97 | 14.30 | 23.01 | CR 85 near Blue Point | Nicolls Road | NY 25A in Stony Brook | |
| CR 98 | 3.07 | 4.94 | CR 80 in Moriches | Frowein Road or Moriches Bypass | CR 80 in East Moriches | Formerly co-designated as NY 27A Truck |
| CR 99 | 6.45 | 10.38 | CR 19 in Holtsville | Woodside Avenue | CR 16 in Brookhaven | |
| CR 100 | 4.80 | 7.72 | CR 13 in Brentwood | Suffolk Avenue | NY 454 in Islandia | Was intended to be extended westward to NY 24 and NY 110 in East Farmingdale |

## Routes 101 and up

| Route | Length (mi) | Length (km) | From | Via | To | Notes |
| CR 101 | 5.23 | 8.42 | CR 80 in East Patchogue | Sills Road & Patchogue–Yaphank Road | Long Island Avenue in Yaphank | Includes an unbuilt extension to CR 46 in Upton |
| CR 102 | | | CR 21 in Yaphank | East Main Street Extension | I-495 exit 68 / CR 46 in East Yaphank | Unbuilt route |
| CR 103 | | | CR 51 | Cedar Swamp Road in Riverhead | CR 58 or I-495 | Unbuilt route |
| CR 104 | 7.44 | 11.97 | CR 80 in Quogue | Quogue-Riverhead Road & Riverleigh Avenue | NY 24 / CR 63 / CR 94 in Riverside | Formerly NY 113 |
| CR 104A | | | CR 80 in East Quogue | Oakville and Lewis roads | CR 104 in Oakville | Former number |
| CR 105 | 5.30 | 8.53 | CR 104 in Flanders | Cross River Drive | Sound Avenue in Northville | Includes an unbuilt western extension to CR 111 in Manorville |
| CR 106 | 0.47 | 0.76 | CR 13 | Community College Drive in Brentwood | CR 7 | Originally a local road within the grounds of Pilgrim State Psychiatric Center. Route unsigned. |
| CR 107 | | | CR 50C in West Babylon | West Babylon–Centerport Road | NY 25A in Centerport | Unbuilt route. |
| CR 108 | 0.24 | 0.39 | CR 67 | Old Willets Path in Hauppauge | CR 6 | Unsigned route. |
| CR 110 | | | CR 97 in Centereach | A.O. Smith Turnpike | NY 25A in Poquott | Unbuilt route; also intended to lead to a bridge between Port Jefferson and Bridgeport, Connecticut |
| CR 111 | 4.77 | 7.68 | NY 27 in Eastport | Captain Daniel Roe Highway (Port Jefferson–Westhampton Road) | I-495 in Manorville | Originally intended to run from NY 25A in Mount Sinai to CR 89 in Westhampton Beach |
| CR 112 | 1.39 | 2.24 | NY 27 | Johnson Avenue in Bohemia | NY 454 at Long Island MacArthur Airport | Unsigned route; not to be confused with NY 112. |
| CR 113 | | | NY 27 in Georgica | Stephen Hands Path | NY 114 in Hardscrabble | No longer recognized by SCDPW or NYSDOT. All signs have been removed. |
| CR 115 | 0.56 | 0.90 | CR 42 in Shelter Island | West Neck Road | NY 114 in Shelter Island Heights | |
| CR 116 | 1.40 | 2.25 | Midway Road | Smith Street & Menantic Road in Shelter Island | CR 115 | |
| CR 117 | 0.45 | 0.72 | Ram Island Road | Burns Avenue in Shelter Island | CR 69 | |