Suffolk County Route Listing
Note: This list contains the county route numbers and termini of roads maintained by Suffolk County and recognized as county routes by the state. There also other roads that were assigned county route numbers but never actually taken over by the county. These numbers can be found in the Former and Proposed Routes section of this web site.
County Line Road
- Direction:
- North/South
- Southern Terminus:
- Merrick Road (NY 27A) in Amityville
- Northern Terminus:
- North of Joyce Avenue in Amityville
- Distance:
- 1.54 miles
- Signed:
- Yes
Dixon Avenue, Straight Path, Seamans Neck Road
- Direction:
- North/South
- Southern Terminus:
- Broadway (NY 110) in Amityville
- Northern Terminus:
- Deer Park Road (NY 231) in Dix Hills
- Distance:
- 8.65 miles
- Signed:
- Yes
Wellwood Avenue, Pinelawn Road
- Direction:
- North/South
- Southern Terminus:
- New York Avenue in Lindenhurst
- Northern Terminus:
- Walt Whitman Road in Melville
- Distance:
- 7.18 miles
- Signed:
- Yes
Commack Road, Town Line Road
- Direction:
- North/South
- Southern Terminus:
- Deer Park Avenue (NY 231) in North Babylon
- Northern Terminus:
- Pulaski Road (CR 11) in Northport
- Distance:
- 10.35 miles
- Signed:
- Yes
Ruland Road
- Direction:
- East/West
- Western Terminus:
- Broad Hollow Road (NY 110) in Melville
- Eastern Terminus:
- Pinelawn Road (CR 3) in Melville
- Distance:
- 1.10 miles
- Signed:
- Yes
Rabro Drive
- Direction:
- East/West
- Western Terminus:
- Old Willets Path (CR 108) in Hauppauge
- Eastern Terminus:
- Wheeler Road (NY 111) in Hauppauge
- Distance:
- 0.86 miles
- Signed:
- Yes
Wicks Road
- Direction:
- North/South
- Southern Terminus:
- Wicks Road (CR 13) and Crooked Hill Road (CR 13) in Brentwood
- Northern Terminus:
- Motor Parkway (CR 67) in Brentwood
- Distance:
- 1.70 miles
- Signed:
- Yes
Elwood Road
- Direction:
- North/South
- Southern Terminus:
- Jericho Turnpike (NY 25) in Elwood
- Northern Terminus:
- Fort Salonga Road (NY 25A) in Northport
- Distance:
- 3.94 miles
- Signed:
- Yes
Woodbury Road, Pulaski Road, East Northport Road
- Direction:
- East/West
- Western Terminus:
- Harbor Road (NY 108) and Woodbury Road (Nassau CR 12) at the Nassau-Suffolk county line in Cold Spring Harbor
- Eastern Terminus:
- Main Street (NY 25A) in Kings Park
- Distance:
- 11.16 miles
- Signed:
- Yes
Oak Street, Hoffman Avenue, Railroad Avenue
- Direction:
- East/West
- Western Terminus:
- Old Sunrise Highway and County Line Road (CR 1) at the Nassau-Suffolk county line
- Eastern Terminus:
- Great East Neck Road (CR 96) and Trolley Line Road in Babylon
- Distance:
- 4.42 miles
- Signed:
- Yes
Fifth Avenue, Wicks Road, Crooked Hill Road
- Direction:
- North/South
- Southern Terminus:
- Montauk Highway (NY 27A) in Bay Shore
- Northern Terminus:
- Commack Road (CR 4) in Brentwood
- Distance:
- 7.58 miles
- Signed:
- Yes
Clinton Avenue
- Direction:
- South ONLY
- Southern Terminus:
- Montauk Highway (NY 27A) in Bay Shore
- Northern Terminus:
- Fifth Avenue (CR 13) in Bay Shore
- Distance:
- 0.64 miles
- Signed:
- Yes
Indian Head Road
- Direction:
- North/South
- Southern Terminus:
- Jericho Turnpike (NY 25) in Commack
- Northern Terminus:
- Main Street (NY 25A) in Kings Park
- Distance:
- 3.21 miles
- Signed:
- Yes
Terry Road, Smithtown Boulevard, Lake Shore Road, Portion Road, Horseblock Road
- Direction:
- East/West
- Western Terminus:
- Middle Country Road (NY 25) in Smithtown
- Eastern Terminus:
- Montauk Highway (CR 80) in Brookhaven
- Distance:
- 16.60 miles
- Signed:
- Yes
Carleton Avenue, Wheeler Road
- Direction:
- North/South
- Southern Terminus:
- Montauk Highway (NY 27A) in East Islip
- Northern Terminus:
- Joshua's Path (NY 111) in Hauppauge
- Distance:
- 5.51 miles
- Signed:
- Yes
West Avenue, Lake Street, Waverly Avenue, Patchogue-Holbrook Road
- Direction:
- North/South
- Western Terminus:
- Division Street (CR 65) in Patchogue
- Eastern Terminus:
- Portion Road (CR 16) in Lake Ronkonkoma
- Distance:
- 6.72 miles
- Signed:
- Yes
Yaphank Avenue, Main Street, Yaphank-Middle Island Road, Rocky Point Road
- Direction:
- North/South
- Southern Terminus:
- Montauk Highway (CR 80) in Brookhaven
- Northern Terminus:
- NY 25A in Rocky Point
- Distance:
- 11.75 miles
- Signed:
- Yes
New Highway
- Direction:
- North/South
- Southern Terminus:
- Sunrise Highway (NY 27) in Copiague
- Northern Terminus:
- Southern Parkway in Lindenhurst
- Distance:
- 1.90 miles
- Signed:
- Yes
Old Riverhead Road
- Direction:
- North/South
- Southern Terminus:
- Montauk Highway (CR 80) in Westhampton Beach
- Northern Terminus:
- Quogue-Riverhead Road (CR 104) in Flanders
- Distance:
- 4.01 miles
- Signed:
- Yes
Lighthouse Road, Ponquogue Bridge
- Direction:
- North/South
- Southern Terminus:
- Dune Road in Hampton Bays
- Northern Terminus:
- Northern end of bridge
- Distance:
- 0.53 miles
- Signed:
- No
Deer Park Avenue
- Direction:
- North/South
- Southern Terminus:
- Village Line Road in Babylon
- Northern Terminus:
- Babylon-Northport Expressway (NY 231) in North Babylon
- Distance:
- 1.34 miles
- Signed:
- Yes
Deer Park Road, Park Avenue
- Direction:
- North/South
- Southern Terminus:
- Deer Park Road (NY 231), Northern Parkway, and East Deer Park Road (CR 66) in Dix Hills
- Northern Terminus:
- Main Street (NY 25A) in Huntington
- Distance:
- 5.44 miles
- Signed:
- Yes
South Country Road
- Direction:
- East/West
- Western Terminus:
- Montauk Highway (CR 80) in East Patchogue
- Eastern Terminus:
- Montauk Highway (CR 80) in Brookhaven
- Distance:
- 5.63 miles
- Signed:
- Yes
North Sea Road
- Direction:
- North/South
- Southern Terminus:
- North Road (NY 27/CR 39) in Southampton
- Northern Terminus:
- Noyack Road in North Sea
- Distance:
- 2.53 miles
- Signed:
- Yes
North Road
- Direction:
- East/West
- Western Terminus:
- Montauk Highway (CR 80) in Shinnecock Hills
- Eastern Terminus:
- Flying Point Road (NY 27/CR 39A) in Southampton
- Distance:
- 6.93 miles
- Signed:
- Yes
Flying Point Road
- Direction:
- East/West
- Western Terminus:
- North Road (NY 27/CR 39) in Southampton
- Eastern Terminus:
- Montauk Highway (NY 27) in Southampton
- Distance:
- 0.63 miles
- Signed:
- No
Canal Road, Old North Highway
- Direction:
- East/West
- Western Terminus:
- North Road (CR 39) in Shinnecock Hills
- Eastern Terminus:
- North Road (CR 39) in Shinnecock Hills
- Distance:
- 0.73 miles
- Signed:
- Yes
North Main Street, Three Mile Harbor Road
- Direction:
- North/South
- Southern Terminus:
- Cedar Street in East Hampton
- Northern Terminus:
- Copeces Lane in East Hampton
- Distance:
- 2.51 miles
- Signed:
- Yes
Springs-Fireplace Road
- Direction:
- North/South
- Southern Terminus:
- Three Mile Harbor Road (CR 40) in East Hampton
- Northern Terminus:
- Woodbine Drive in East Hampton
- Distance:
- 3.06 miles
- Signed:
- Yes
Shore Road
- Direction:
- East/West
- Eastern Terminus:
- West Neck Road (CR 115) on Shelter Island
- Western Terminus:
- Rocky Point Avenue on Shelter Island
- Distance:
- 1.20 miles
- Signed:
- Yes
Northville Turnpike
- Direction:
- North/South
- Southern Terminus:
- Roanoke Avenue (CR 73) in Riverhead
- Northern Terminus:
- Sound Avenue in Northville
- Distance:
- 3.42 miles
- Signed:
- Yes
William Floyd Parkway
- Direction:
- North/South
- Southern Terminus:
- Fire Island Beach Road (CR 75) in Smith Point Park
- Northern Terminus:
- NY 25A in Shoreham
- Distance:
- 13.78 miles
- Signed:
- Yes
Great Neck Road, Main Street
- Direction:
- North/South
- Southern Terminus:
- Montauk Highway (NY 27A) in Copiague
- Northern Terminus:
- Nassau-Suffolk county line
- Distance:
- 3.77 miles
- Signed:
- Yes
Middle Road
- Direction:
- East/West
- Western Terminus:
- Sound Avenue in Mattituck
- Eastern Terminus:
- Main Road (NY 25) in Greenport
- Distance:
- 14.21 miles
- Signed:
- Yes
Edgemere Street, Flamingo Avenue
- Direction:
- North/South
- Southern Terminus:
- Montauk Highway (NY 27) in Montauk
- Northern Terminus:
- West Lake Drive (CR 77) in Montauk
- Distance:
- 3.10 miles
- Signed:
- Yes