New York Routes (I-81)

Interstate 81

Northbound I-81 reassuance shield near Homer.
(Mark Sinsabaugh, 06/01/2026)

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Southern Terminus: PA Line at Conklin
Northern Terminus: US-Canada Border at Wellesley Island (Continues as ON 137)
Length: 183.42 miles (295.31 km)
Orientation: North-South
Counties: Broome, Cortland, Onondaga, Oswego, Jefferson
Cities: Binghamton, Cortland, Syracuse, Watertown
Villages: Whitney Point, Marathon, Homer, North Syracuse, Parish, Pulaski, Sandy Creek, Adams
Towns:

Kirkwood, Dickinson, Chenango, Barker, Triangle, Lisle, Marathon, Lapeer, Virgil, Cortlandville, Homer, Preble, Tully, Lafayette, Onondaga, Salina, Clay, Cicero, Parish, Mexico, Richland, Sandy Creek, Ellisburg, Adams, Hounsfield, Watertown, Pamelia, Orleans, Alexandria
Name(s): American Legion Memorial Highway
History:

Construction began in 1954, with the last sections opening in 1971.
Sometime in 2026, the segment of I-81 between Exits 16A and 29 will be relocated to the current I-481 alignment as the elevated section of I-81 in downtown Syracuse is expected to be demolished and replaced with a grade level boulevard. Construction began in 2023 with reconstruction of the two interchanges with I-481 north and south of Syracuse. The project as a whole is expected to be completed by 2028.
The process to convert I-81's exit numbering scheme from sequential to mileage based began in 2023 with the exits in NYSDOT Region 3 (Cortland, Onondaga, and Oswego Counties) along sections that will not be relocated. Exit numbers in Broome County made the switch in early 2025. Exit numbers north of Syracuse reflect the new mileage once the Syracuse section of I-81 is relocated to I-481. Exits in Jefferson County are expected to be renumbered in Spring 2026.

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Mile Desc.
. .

0.00 JCT

(Mark Sinsabaugh, 08/26/2018)
(Mark Sinsabaugh, 04/11/2025)
3.98

(Mark Sinsabaugh, 04/15/2023)
(Mark Sinsabaugh, 04/11/2025)
8.47

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 04/21/2018)
. MP .
8.72
.
.
(Mark Sinsabaugh, 04/11/2025)
12.01
.

(Mark Sinsabaugh, 04/17/2025) .
12.40

(Mark Sinsabaugh, 06/01/2026)
(Mark Sinsabaugh, 04/11/2025)
. MP .
12.88

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 04/11/2025)
13.54

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 04/11/2025)
14.77
(WT) .

(Mark Sinsabaugh, 09/16/2005) .
15.66
.

(Mark Sinsabaugh, 04/17/2025) .
16.42
.
.
(Mark Sinsabaugh, 04/11/2025)
21.52

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 04/11/2025)
28.83

.

(Mark Sinsabaugh, 04/17/2025) .
30.23
.
.
(Mark Sinsabaugh, 04/11/2025)
35.68 .

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 05/28/2026)
38.17

(Mark Sinsabaugh, 06/01/2026)
39.90

(Mark Sinsabaugh, 04/11/2025)
49.90

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 04/11/2025)
52.27

(Mark Sinsabaugh, 06/01/2026)
(Mark Sinsabaugh, 04/11/2025)
53.94

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 04/11/2025)
62.75

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 04/11/2025)
65.04 .

(Mark Sinsabaugh, 06/01/2026)
(Mark Sinsabaugh, 05/28/2026)
66.51

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 05/28/2026)
73.13

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 04/11/2025)
78.04

(Mark Sinsabaugh, 04/17/2025)
(Mark Sinsabaugh, 05/28/2026)
81.37
(ST)

(Mark Sinsabaugh, 06/01/2026)
(Mark Sinsabaugh, 05/03/2008)
82.35
.
(Mark Sinsabaugh, 05/03/2008)
83.77

(Mark Sinsabaugh, 12/11/2009)
(Mark Sinsabaugh, 05/03/2008)
84.43

(Exit 12) (Exit 12)

(Mark Sinsabaugh, 12/11/2009)
(Mark Sinsabaugh, 03/26/2022)
84.74 .
.
(Mark Sinsabaugh, 08/03/2008)
84.83

.
.
(Mark Sinsabaugh, 03/26/2022)
85.28 .
.
(Mark Sinsabaugh, 03/26/2022)
85.31

.

(Mark Sinsabaugh, 04/13/2008) .
86.39

(Mark Sinsabaugh, 04/13/2008)
(Mark Sinsabaugh, 03/02/2019)
87.78

(Mark Sinsabaugh, 05/15/2009)
(Mark Sinsabaugh, 05/03/2008)
88.18 (Exit 36)

(Douglas Kerr, 11/28/2008)
(Mark Sinsabaugh, 08/03/2008)
89.67 .

(Mark Sinsabaugh, 08/03/2008) .
90.33

(Douglas Kerr, 12/12/2009)
(Mark Sinsabaugh, 06/28/2009)
91.16 .
.
(Mark Sinsabaugh, 06/28/2009)
92.54

(NT, Exit 9) / (ST, Exit 9)

(Douglas Kerr, 12/12/2009)
(Mark Sinsabaugh, 06/28/2009)
95.03

(Mark Sinsabaugh, 09/20/2025)
(Mark Sinsabaugh, 06/28/2009)
98.96

(Douglas Kerr, 09/10/2009)
(Mark Sinsabaugh, 06/28/2009)
99.15
102.78

(Douglas Kerr, 09/10/2009) .
111.08

(Douglas Kerr, 09/10/2009) .
114.72

(Douglas Kerr, 07/23/2004) .
118.15

121.56
.
122.34
.
.
(Mark Sinsabaugh, 10/09/2020)
128.15

.
(Mark Sinsabaugh, 10/09/2020)
129.98 .
.
(Mark Sinsabaugh, 05/20/2009)
130.68

.
(Mark Sinsabaugh, 05/20/2009)
132.71

.
(Mark Sinsabaugh, 05/20/2009)
134.59

(Douglas Kerr, 03/21/2009)
(Mark Sinsabaugh, 05/20/2009)
140.15

(Douglas Kerr, 03/21/2009)
(Mark Sinsabaugh, 05/20/2009)
144.28
(ET)

(Douglas Kerr, 03/21/2009)
(Mark Sinsabaugh, 07/19/2026)
145.83

(Douglas Kerr, 03/21/2009)
(Mark Sinsabaugh, 07/19/2026)
148.19

(Mark Sinsabaugh, 04/22/2018) .
152.50

.
(Douglas Kerr, 08/23/2008)
153.47

.
(Douglas Kerr, 04/01/2007)
154.95

(Douglas Kerr, 07/23/2004)
(Douglas Kerr, 04/01/2007)
157.57

.
(Douglas Kerr, 04/01/2007)
158.00
(WT)

(George Bourey, 06/28/2020)
(George Bourey, 06/28/2020)
169.07

(Mark Sinsabaugh, 09/10/2011)
(Douglas Kerr, 04/01/2007)
178.04

(Douglas Kerr, 04/24/2003)
(Douglas Kerr, 04/01/2007)
. . .
179.70

(Douglas Kerr, 00/00/0000)
(Douglas Kerr, 04/01/2007)
182.93

(Douglas Kerr, 00/00/0000) .
183.42 .
Customs - Border Patrol
STOP FOR INSPECTION

. . EXPRESSWAY ENDS

183.42 JCT

. .

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Northbound
PA State Line to Kirkwood (Exit 8: I-86/NY 17) (May 2012)
Kirkwood (Exit 8: I-86/NY 17) to Port Dickinson (Exit 15: I-88) (August 2010)
Nimmonsburg (Exit 16: US 11/NY 12) to Castle Creek (Exit 21: US 11) (May 2012)
Cicero (Exit 96: BL-81/NY 481) to Central Square (Exit 106: NY 49) (February 2012)
Mannsville (Exit 134: US 11) to Adams (Exit 143: NY 178) (May 2012)
Adams (Exit 143: NY 178) to Kellogg Hill (Exit 149: US 11) (May 2012)
LaFargeville (Exit 172: NY 411) to Alexandria Bay (Exit 181: NY 12) (May 2012)
Alexandria Bay (Exit 181: NY 12) to Canadian Border (May 2012) Southbound
Canadian Border to Alexandria Bay (Exit 181/NY 12) (May 2012)
Alexandria Bay (Exit 181: NY 12) to LaFargeville (Exit 172: NY 411) (May 2012)
Adams (Exit 143: NY 178) to Mannsville (Exit 134: US 11) (May 2012)
Kirkwood (Exit 8: I-86/NY 17) to PA State Line (March 2012)

Old state name I-81 reassurance marker northbound,
with I-86 and NY 17 markers, at the Binghamton city line.
(Mark Sinsabaugh, 06/01/2026)

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New York State Roads: I-81 Exit List (Valerie Deane)
Thousand Islands Bridge Authority

Page Created: October 3, 2006 | Page Updated: July 20, 2026

Southern Terminus:	PA Line at Conklin
Northern Terminus:	US-Canada Border at Wellesley Island (Continues as ON 137)
Length:	183.42 miles (295.31 km)
Orientation:	North-South
Counties:	Broome, Cortland, Onondaga, Oswego, Jefferson
Cities:	Binghamton, Cortland, Syracuse, Watertown
Villages:	Whitney Point, Marathon, Homer, North Syracuse, Parish, Pulaski, Sandy Creek, Adams
Towns:	Kirkwood, Dickinson, Chenango, Barker, Triangle, Lisle, Marathon, Lapeer, Virgil, Cortlandville, Homer, Preble, Tully, Lafayette, Onondaga, Salina, Clay, Cicero, Parish, Mexico, Richland, Sandy Creek, Ellisburg, Adams, Hounsfield, Watertown, Pamelia, Orleans, Alexandria
Name(s):	American Legion Memorial Highway
History:	Construction began in 1954, with the last sections opening in 1971. Sometime in 2026, the segment of I-81 between Exits 16A and 29 will be relocated to the current I-481 alignment as the elevated section of I-81 in downtown Syracuse is expected to be demolished and replaced with a grade level boulevard. Construction began in 2023 with reconstruction of the two interchanges with I-481 north and south of Syracuse. The project as a whole is expected to be completed by 2028. The process to convert I-81's exit numbering scheme from sequential to mileage based began in 2023 with the exits in NYSDOT Region 3 (Cortland, Onondaga, and Oswego Counties) along sections that will not be relocated. Exit numbers in Broome County made the switch in early 2025. Exit numbers north of Syracuse reflect the new mileage once the Syracuse section of I-81 is relocated to I-481. Exits in Jefferson County are expected to be renumbered in Spring 2026.