Suffolk County

Suffolk County At-A-Glance

Established: 1683
Population: 1,493,350 (2010), 1,525,920 (2020)
County Seat: Riverhead
Cities: None
Villages: Amityville, Asharoken, Babylon, Belle Terre, Bellport, Brightwaters, Dering Harbor, East Hampton, Greenport, Head of the Harbor, Huntington Bay, Islandia, Lake Grove, Lindenhurst, Lloyds Harbor, Mastic Beach, Nissequogue, North Haven, Northport, Northville, Old Field, Patchouge, Poquott, Port Jefferson, Quogue, Sag Harbor, Sagaponack, Shoreham, Southampton, Village of the Branch, West Hampton Dunes, Westhampton Beach
Towns: Babylon, Brookhaven, East Hampton, Huntington, Islip, Riverhead, Shelter Island, Smithtown, Southampton, Southold
Bordering Counties: Nassau
NYSDOT Region Code: 07
Designated Market Area: New York
Area Codes: 631
Suffolk County Official Website

State Routes

Interstate United States New York
None

Reference Routes

Route Name Southern/Western
Terminus		 Northern/Eastern
Terminus		 Length Notes
900A Main St. Greenport Marina 0.08 miles
(0.13 km)
900C Orient Park Rd. Orient Beach State Park 0.68 miles
(1.09 km)
900W Montauk Hwy. Suffolk CR 80
Knoll Rd.		 Tuckahoe Ln. 2.79 miles
(4.49 km)
901A Hauppague Center Rd. Kings Rd. 0.67 miles
(1.08 km)
906A EAST Service Road Nassau County Line Suffolk CR 101
Sills Rd.		 27.17 miles
(43.74 km)		 Total Distance NYC Line to Suffolk CR 101: 40.99 miles
906B WEST Service Road Nassau County Line Suffolk CR 101
Sills Rd.		 27.13 miles
(43.68 km)		 Total Distance NYC Line to Suffolk CR 101: 41.08 miles
906C EAST Service Road Hospital Rd. 20.00 miles
(32.20 km)		 Exits 37-54
906D WEST Service Road 20.41 miles
(32.86 km)		 Exits 37-53
908G Nassau County Line 12.15 miles
(19.56 km)		 Total Distance Grand Central Parkway to NY 454: 28.89 miles
908J Robert Moses State Park Entrance 8.39 miles
(13.51 km)
908K Sunken Meadow State Park Entrance 11.35 miles
(18.27 km)		 Sagtikos - 5.34 miles
Sunken Meadow - 6.01 miles
908M Nassau County Line Heckscher State Park Entrance 17.07 miles
(27.48 km)		 Total Distance Belt Parkway to Heckscher State Park: 33.69 miles
909D Nassau County Line Captree State Park Entrance 9.20 miles
(14.81 km)		 Total Distance Meadowbrook Parkway to Captree State Park: 15.67 miles

County Routes


(Douglas Kerr, 12/25/2010)

Suffolk County posts the standard pentagonal reassurance markers along most of its routes.

Route Name Southern/Western
Terminus		 Northern/Eastern
Terminus		 Length Notes
County Line Rd. Joyce Ave. 1.54 miles
(2.48 km)
Dixon Ave.
Straight Path
 8.53 miles
(13.73 km)
Wellwood Ave.
Pinelawn Rd.		 Lindenhurst Village Line
(Wellwood Ave.)		 Old Walt Whitman Rd. 6.84 miles
(11.01 km)
Commack Rd.
Townline Rd.		 Smithtown-Huntington Town Line 9.31 miles
(14.99 km)
Ruland Rd.
Colonial Springs Rd.		 Huntington-Babylon Town Line
(Main Ave.)		 1.78 miles
(2.87 km)
Rabro Dr. Suffolk CR 108 0.86 miles
(1.38 km)
Wicks Rd. Suffolk CR 13 Suffolk CR 67 1.75 miles
(2.82 km)
Cuba Hill Rd.
Greenlawn Rd.		 Suffolk CR 10 4.65 miles
(7.49 km)
Elwood Rd. 3.94 miles
(6.34 km)
Woodbury Rd.
Pulaski Rd.		 0.00 miles
(0.00 km)
Oak St.
Hoffman Ave.
Railroad Ave.		 Suffolk CR 1 Suffolk CR 96 4.45 miles
(7.16 km)
5th Ave Suffolk CR 4 7.50 miles
(12.08 km)
Clinton Ave. Suffolk CR 13 0.65 miles
(1.05 km)
Indian Head Rd, 3.22 miles
(5.18 km)
Terry Rd.
Smithtown Blvd.
Lake Shore Rd.
Portion Rd.
Horse Block Rd.		 Suffolk CR 80 15.90 miles
(25.60 km)
Carleton Ave.
Wheeler Rd.		 5.51 miles
(8.87 km)
Waverly Ave.
Holbrook-Patchogue Rd.		 Suffolk CR 65/85 Suffolk CR 16 6.42 miles
(10.33 km)
Yaphank Rd. Suffolk CR 16 11.20 miles
(18.03 km)
New Hwy.
Republic Rd.		 Suffolk CR 5 2.31 miles
(3.72 km)
Old Riverhead Rd. Suffolk CR 80 Suffolk CR 104 4.01 miles
(6.46 km)
Lighthouse Rd. Suffolk CR 89 North End of Ponquogue Bridge 0.77 miles
(1.24 km)
Deer Park Ave. Babylon Village Line
(Deer Park Ave.)		 1.34 miles
(2.16 km)
Deer Park Rd.
Park Ave.
Mill Dam Rd.		 W. Shore Rd. 7.04 miles
(11.33 km)		 Discontinuous 0.10 miles at NY 110
South Country Rd. Suffolk CR 80 Suffolk CR 80 5.63 miles
(9.06 km)		 Former NY 27 alignment
North Sea Rd. Suffolk CR 39 Noyac Rd. 2.53 miles
(4.07 km)
North Rd.
Sunrise Hwy.		 Suffolk CR 80 Suffolk CR 39A 6.69 miles
(10.77 km)		 All except western 1.87 miles concurrent with NY 27
Flying Point Rd. Suffolk CR 39 0.62 miles
(1.00 km)		 Concurrent with NY 27
Canal Rd.
Old North Hwy.		 Suffolk CR 39 Suffolk CR 39 0.73 miles
(1.18 km)
N. Main St.
Three Mile Harbor Rd.		 Cedar St. Copeces Ln. 2.51 miles
(4.04 km)
Springs Fireplace Rd. Suffolk CR 40 Woodbine Dr. 3.00 miles
(4.83 km)
Shore Rd. Rocky Point Ave. Suffolk CR 115 1.20 miles
(1.93 km)
Northern Tpke. Suffolk CR 73 Sound Ave. 3.42 miles
(5.51 km)
William Floyd Pkwy. Suffolk CR 75 15.37 miles
(24.75 km)
Great Neck Rd.
Main St.		 Nassau County Line
(Main St.)		 3.77 miles
(6.07 km)
North Rd. Cox Neck Rd. 13.60 miles
(21.90 km)
Edgemere St. Suffolk CR 77 2.84 miles
(4.57 km)
Union Blvd. 9.93 miles
(15.99 km)
Moriches-Riverhead Rd. Suffolk CR 80 Suffolk CR 94 8.46 miles
(13.62 km)
Sandy Hollow Rd. Suffolk CR 39 Suffolk CR 38 0.88 miles
(1.41 km)
Hulse Landing Rd. Sound Rd. Wading River Rd. 1.02 miles
(1.64 km)
Eastport Manor Rd. Suffolk CR 80 Suffolk CR 51 0.96 miles
(1.55 km)
Victory Rd. Suffolk CR 46 Suffolk CR 16 2.20 miles
(3.54 km)
Bay Shore Rd. Suffolk CR 50 4.54 miles
(7.31 km)
Old Country Rd. 4.42 miles
(7.12 km)
Long Ln. East Hampton Village Line
(Newtown Ln.)		 Stephen Hands Path 1.16 miles
(1.87 km)
Long Beach Rd. Noyack Rd. 2.80 miles
(4.51 km)
Waverly Ave. Suffolk CR 19 Suffolk CR 99 0.32 miles
(0.52 km)
Newtown Rd.
Sunset Ave.		 Suffolk CR 80 Dead End at Shinnecock Canal 0.89 miles
(1.43 km)
Lake Ave. Suffolk CR 51 1.84 miles
(2.96 km)
Middle Ave.
Weeks St.
River Ave.
Division St.
 Suffolk CR 85 Suffolk CR 19/85 4.78 miles
(7.70 km)
Deer Park Rd. East Suffolk CR 35 0.92 miles
(1.48 km)
Vanderbilt Pkwy.
Long Island Motor Pkwy.		 Half Hollow Rd. Suffolk CR 93 14.43 miles
(23.23 km)
N. Cartwright Rd. Ram Island Rd. 1.43 miles
(2.30 km)

West Segment		 Mill Rd. Suffolk CR 80 Suffolk CR 55 0.49 miles
(0.79 km)

East Segment		 Mill Rd. S. Country Rd. Suffolk CR 80 0.53 miles
(0.85 km)
Roanoke Ave. Suffolk CR 58 1.27 miles
(2.04 km)
William Floyd Pkwy. Suffolk CR 46 Smith Point County Park Entrance 0.50 miles
(0.81 km)
Townline Rd. Nichols Rd. 3.25 miles
(5.23 km)
W. Lake Dr. Suffolk CR 49 3.00 miles
(4.83 km)
Sag Harbor Tpke. Brick Kiln Rd. 3.73 miles
(6.01 km)
Montauk Hwy. Patchogue Village Line
(Main St.)		 Reference Route 900W/Knoll Rd. 32.50 miles
(52.33 km)		 Former NY 27 alignment
Higbie Ln. 1.62 miles
(2.61 km)
N. Ocean Ave.
Patchogue-Mt. Sinai Rd.		 11.55 miles
(18.60 km)
Montauk Hwy. Suffolk CR 19 8.11 miles
(13.06 km)		 Former eastern extension of NY 27A
Broadway
Centerport Rd.		 3.85 miles
(6.20 km)
Dune Rd. Westhampton Beach Village Line
(Dune Rd.)		 Jessup Ln. 1.18 miles
(1.90 km)
Furrows Rd. Suffolk CR 97 Waverly Ave. 0.53 miles
(0.85 km)
Oakwood Rd. 2.89 miles
(4.65 km)
Lakeland Ave.
Ocean Ave.
Rosevale Ave.		 Suffolk CR 16 5.48 miles
(8.82 km)
Edwards Ave.
Nugent Dr.		 River Rd. 4.58 miles
(7.37 km)		 Concurrent with NY 24 except north of I-495
0.15 miles
(0.24 km)
Bergen Ave.
Great East Neck Rd.		 Dead End at Bergen Point 2.05 miles
(3.30 km)
Nicolls Rd. Suffolk CR 85 14.29 miles
(23.01 km)
Frowein Rd. Suffolk CR 80 Suffolk CR 80 3.07 miles
(4.94 km)
Woodside Ave. Suffolk CR 19 Suffolk CR 16 6.45 miles
(10.38 km)
Suffolk Ave. Suffolk CR 13 4.80 miles
(7.73 km)
Patchogue-Yaphank Rd. Suffolk CR 80 Long Island Ave. 5.23 miles
(8.42 km)
Quogue-Riverhead Rd.
Riverleigh Ave.		 Suffolk CR 80 Suffolk CR 63 7.45 miles
(11.99 km)		 Formerly (1930-72)
Cross River Dr. Suffolk CR 104 Sound Ave. 5.30 miles
(8.53 km)
Community College Dr. Suffolk CR 13 Suffolk CR 7 0.47 miles
(0.76 km)
Suffolk CR 67 Suffolk CR 6 0.24 miles
(0.39 km)
Captain Daniel Roe Hwy. 4.77 miles
(7.68 km)
Johnson Ave. 1.39 miles
(2.24 km)
W. Neck Rd. Suffolk CR 42 0.56 miles
(0.90 km)
N. Menantic Rd.
Smith St.		 N. Midway Rd. Suffolk CR 115 1.40 miles
(2.25 km)
Burns Rd. St. Mary's Rd. Suffolk CR 69 0.45 miles
(0.72 km)

Some information on this page comes from Nathan Perry's Empire State Roads and J.P. Wing's Upstate New York Roads.

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