County routes in Sullivan County, New York, are maintained by the Sullivan County Division of Public Works and signed with the Manual on Uniform Traffic Control Devices-standard yellow-on-blue pentagon route marker. The county highway system comprises roughly 140 routes arranged across the county in groups of nine. For the most part, state routes in Sullivan County are county-maintained and co-signed with county routes. However, the converse is not true; that is, not all county routes overlap state routes for their entire length. Typically, each series consists of county routes along a single roadway, often overlapping with state highways in the process. The lowest numbered route in the system is County Route 11 (CR 11); the highest is CR 183C. Note that routes 160 through 169 do not conform to any style, and coincidentally the 170 through 179 series (with the exception of the spur designated 174A) follows the pre-expressway routing of New York State Route 17 (NY 17).

Sullivan County posted signage of their routes in 1958.

Routes 1–50

Barryville to Claryville (11–19) The Barryville to Claryville series encompasses routes 11 through 17 and CR 19, the non-suffixed of which form a mostly continuous roadway between the two communities. Most of the routes are concurrent to NY 55, which follows the Barryville–Claryville route from Barryville north to Curry. At Curry, CR 19 splits from NY 55 to access Claryville. The Barryville–Claryville route is interrupted four times by three state-maintained stretches of NY 55 (from CR 13 to CR 14; from CR 16 to CR 17; and from CR 17 to CR 19) and a locally maintained section within the village of Liberty.

Route list Route Length(mi) Length(km) From Via To Notes NY 97 Brook Road in Highland CR 12 at Eldred Street Entire length overlaps with NY 55 NY 97 River Road in Highland Dead end near NY 55 / NY 97 junction CR 11 at Eldred Street in Highland Board Road CR 13 / CR 26 in Bethel Entire length overlaps with NY 55 CR 12 / CR 26 White Lake Road in Bethel NY 17B Entire length overlaps with NY 55 NY 17B Swan Lake Road in Bethel Liberty town line Entire length overlaps with NY 55 Bethel town line Liberty Road in Liberty Liberty village line Entire length overlaps with NY 55 Liberty village line in Liberty Neversink Road Aden Road in Neversink Entire length overlaps with NY 55 Wilson Shields Road Neversink Road in Neversink Wagners Road Entire length overlaps with NY 55 NY 55 Claryville Road in Neversink Ulster County line Part south of CR 157 was formerly part of NY 42

Barryville to Narrowsburg (21–26) The Barryville to Narrowsburg series encompasses routes 21 through 26. CR 21, CR 22, and CR 23 form a continuous roadway north to an intersection with NY 97 near Narrowsburg, while CR 24 follows two county-maintained sections of NY 52 in the town of Tusten. The remaining routes are assigned to various connectors in the towns of Tusten and Highland.

Route list Route Length(mi) Length(km) From Via To Notes NY 97 Barryville–Yulan Road CR 22 / CR 33 NY 97 River Road in Highland CR 21 CR 21 / CR 33 in Highland Beaver Brook Road CR 23 / CR 26 in Tusten NY 97 Lumberland–Mount Hope Road in Tusten CR 22 / CR 26 Main Street Bridge Street and Narrowsburg Road in Tusten CR 111 at Cochecton town line Entire length overlaps with NY 52; discontinuous at NY 97 NY 97 Eckes Road in Tusten NY 52 / CR 24 CR 22 / CR 23 in Tusten Crystal Lake Road NY 55 / CR 13 in Bethel

Mongaup to Yulan (31–33) The Mongaup to Yulan series is only CR 31 through CR 33, as routes 34 through 39 do not currently exist within the county. The roadway begins as CR 31 at NY 97 in Mongaup and heads northwest to a junction with CR 21 and CR 22 in Yulan. CR 31 and CR 32 do not directly intersect each other; instead, they are connected by the northernmost portion of CR 41.

Route list Route Length(mi) Length(km) From Via To Notes NY 97 Upper Mongaup Road in Lumberland CR 41 NY 55 / CR 12 / CR 33 in Highland Proctor Road CR 41 / CR 42 in Lumberland CR 21 / CR 22 Eldred–Yulan Road in Highland NY 55 / CR 12 / CR 32

Pond Eddy to Monticello (41–49) The Pond Eddy to Monticello series is made up of CR 41 through CR 45 and CR 47 through CR 49, including CR 45A. The Pond Eddy–Monticello roadway begins at NY 97 in Pond Eddy and progresses north as CR 41 through CR 45, from south to north, to a terminus at NY 42 south of Monticello. CR 47 is a spur off CR 32 from Eldred to Highland Lake. The route itself does not connect to any other route in the Pond Eddy-Monticello series; however, the unnumbered Mohican Lake Road continues east from the eastern terminus of CR 47 to intersect CR 42 near Glen Spey. The remaining routes are spurs off the main Pond Eddy–Monticello route.

Route list Route Length(mi) Length(km) From Via To Notes Pennsylvania state line High Road in Lumberland CR 32 / CR 42 CR 32 / CR 41 Forestburgh Road in Lumberland CR 43 at Leers Road CR 42 at Leers Road in Lumberland Forestburgh Road NY 42 / CR 48 in Forestburgh CR 43 Plank and Sackett Lake roads in Forestburgh CR 45 at Thompson town line CR 44 at Forestburgh town line Sackett Lake Road in Thompson NY 42 CR 45 Sackett Lake Road in Thompson NY 42 CR 32 Highland Lake Road in Highland Lakeview Drive NY 42 / CR 43 Hartwood Road in Forestburgh CR 49 / CR 101 Orange County line (becomes CR 7) Oakland Valley Road in Forestburgh CR 48 / CR 101

Routes 51–100

Liberty to Spring Glen (51–59) The Liberty to Spring Glen series consists of routes 51 through 59. Routes 51 through 55 follow a single roadway across eastern Sullivan County from Liberty to the Ulster County line, with a brief gap between CR 53 and CR 54 in Woodridge. In Ulster County, the road continues as the short CR 80, terminating at US 209 in Spring Glen. CR 59 is a connector between NY 17B and CR 174 near Monticello and does not connect to any other route in the Liberty-Spring Glen series. The remaining routes are connectors in the vicinity of Woodridge.

Route list Route Length(mi) Length(km) From Via To Notes NY 52 Hilldale Road in Fallsburg CR 52 / CR 104 CR 51 / CR 104 Brickman Road in Fallsburg NY 42 / CR 53 Roosevelt Avenue Old Falls Road in Fallsburg NY 42 / CR 52 west of Woodridge east village line Mountaindale Road CR 55 / CR 56 in Fallsburg CR 54 / CR 56 in Fallsburg Main Street and Mountaindale Road Ulster County line in Mamakating (becomes CH 80) CR 172 in Mamakating Masten Lake Road CR 54 / CR 55 in Fallsburg Rock Hill Drive at NY 17 exit 109 in Thompson Glen Wild Road Woodridge village line in Fallsburg NY 17B Kaufman Road in Thompson NY 17 eastbound on-ramp

New Vernon to Burlingham (61–66) The New Vernon to Burlingham series consists of routes 61–65. CR 62 (Winterton Road) runs from the Orange County line near New Vernon to the village of Bloomingburg, where it connects to the village-maintained South Road. The road changes names to North Road at Main Street, and county maintenance of the highway resumes at the north village line as CR 61. It heads northeast from the village as Burlingham Road to the Ulster County line. The other four routes in the series are spurs off the primary New Vernon–Burlingham highway.

Route list Route Length(mi) Length(km) From Via To Notes Bloomingburg village line Burlingham Road in Mamakating Ulster County line (becomes CR 7) Orange County line (becomes CR 18) Winterton Road in Mamakating Bloomingburg village line CR 62 Camp Bell Road in Mamakating Orange County line Once crossed Shawangunk Kill to connect to Hubbard Road CR 65 Spruce Road in Mamakating Orange County line Orange County line (becomes CR 90) Upper Road in Mamakating CR 62 CR 61 Hamilton Road in Mamakating Orange County line (becomes CR 48)

Mongaup Valley to Liberty (71–75) The route from Mongaup Valley to Liberty comprises routes 71 through 75, with routes 71 through 73 serving as the primary roadway between the hamlet of Mongaup Valley and the village of Liberty. CR 74 and CR 75 are spurs leading away from the main route.

Route list Route Length(mi) Length(km) From Via To Notes NY 55 / CR 15 Ferndale Road in Liberty NY 17 exit 101 / CR 175 CR 73 / CR 74 Lt. J.G. Brender Highway in Liberty CR 71 Gale Road in Bethel Lt. J.G. Brender Highway CR 72 / CR 74 in Liberty NY 55 / CR 14 / CR 15 Stanton Corners Road in Liberty CR 72 / CR 73 CR 174 in Thompson Harris–Bushville Road CR 73 in Bethel

Livingston Manor to Parksville (81–85) The Livingston Manor–Parksville series comprises routes 81 through 85, which form a discontinuous, circuitous route between the two communities via Catskill Park. Routes 81 through 83 lead east from Livingston Manor to the hamlet of Debruce while CR 84 and CR 85 head northeast from Parksville to the community of Willowemoc. Debruce (CR 83) and Willowemoc (CR 84) are connected by a town road named Willowemoc Road.

Route list Route Length(mi) Length(km) From Via To Notes CR 178 Debruce Road in Rockland CR 82 CR 81 Debruce Road in Rockland CR 83 CR 82 Debruce Road in Rockland Willowemoc Road CR 85 at Cooley Mountain Road in Liberty Cooley and Parksville roads Willowemoc Road in Neversink NY 17 Cooley Road in Liberty CR 84 at Cooley Mountain Road

Hankins to Rockland (91–96) The Hankins to Rockland series extends from the hamlet of Hankins adjacent to the Delaware River to the Delaware County line north of the hamlet of Roscoe. The main route comprises CR 91 through CR 94, with CR 95 and CR 96 serving as spurs off the road. CR 91 and CR 92 connect by way of CR 124 and CR 179.

Route list Route Length(mi) Length(km) From Via To Notes CR 179 / CR 179A Rockland Road in Rockland Delaware County line (becomes CR 7) Entire length overlaps with NY 206 CR 93 / CR 96 in Fremont Tennanah Lake Road and Riverside Drive CR 123 / CR 124 in Rockland CR 94 / CR 95 Hankins Road in Fremont CR 92 / CR 96 NY 97 Hankins Road in Fremont CR 93 / CR 95 CR 93 / CR 94 in Fremont Obernburg Road CR 121 / CR 122 in Callicoon Crowley Road Tennanah Lake Road in Fremont CR 92 / CR 93

Routes 101 and up

Hartwood to Neversink (101–109) The Hartwood–Neversink series comprises routes 101 through 109 and connects the hamlets of Hartwood and Neversink. The main route utilizes CR 101 through CR 105, with the remaining routes serving as spurs or connectors off the primary path.

Route list Route Length(mi) Length(km) From Via To Notes CR 48 / CR 49 Cold Spring Road in Forestburgh CR 102 / CR 108 CR 101 / CR 108 in Forestburgh Cold Spring Road Monticello village line in Thompson NY 42 Anawana Lake Road in Thompson CR 104 / CR 107 CR 103 / CR 107 in Fallsburg Main Street and Loch Sheldrake Road NY 52 in Thompson NY 52 in Neversink Divine Corners Road NY 55 in Neversink Splits into two legs at north end Monticello village line Old Liberty Road in Thompson CR 103 / CR 104 NY 42 Saint Josephs Road in Forestburgh CR 101 / CR 102 NY 42 in Thompson Kiamesha Lake Road CR 161 in Fallsburg

Narrowsburg to Cochecton (111–117) The Narrowsburg–Cochecton series comprises routes 111 through 117, which collectively form the shape of a backward "C" between the hamlets of Narrowsburg and Cochecton. Routes 111 through 113 follow NY 52 northeast to Fosterdale, from where the road heads west to the Pennsylvania state line at Cochecton via CR 114 (the former Newburgh and Cochecton Turnpike). The remaining routes are spurs off the primary path.

Route list