|Interstate Highways of the New Hampshire Highway System|
Highway marker for Interstates 93 and 293
|Formed||August 14, 1957|
|Interstates||Interstate nn (I-nn)|
The Interstate Highways in New Hampshire comprise three current primary Interstate Highways and two auxiliary Interstates. In addition, one auxiliary Interstate number has been decommissioned along with a lone business Interstate.
|Number||Length (mi)||Length (km)||Southern or western terminus||Northern or eastern terminus||Formed||Removed||Notes|
|I-89||60.864||97.951||I-93 & NH 3A in Bow||I-89 at Lebanon||1967||current||Highway continues north into Vermont.|
|I‑89 BL||3.9||6.3||I-89 at Enfield||I-89 at Lebanon||1968||2000||From I-89 Exit 17 to Exit 19 along current US 4. Only one shield remained for the route in July 2000 and it was taken down by 2004. It was the only Interstate Business route in New Hampshire.|
|I-93||131.764||212.054||I-93 at Salem||I-93 at Littleton||1957||current||Partially tolled between Manchester and Concord as part of the Everett Turnpike. Continues south into Massachusetts and north in Vermont.|
|I-95||16.193||26.060||I-95 at Seabrook||I-95 at Portsmouth||1957||current||Tolled as the New Hampshire Turnpike. Continues south into Massachusetts and north into Maine.|
|I-193||3.291||5.296||I-93/NH 101 in Manchester||Everett Tpk. in Bedford||1961||1976||Southern leg of what is now designated I-293.|
|I-293||11.771||18.944||I-93/NH 101 in Manchester||I-93/Everett Tpk. in Hooksett||1976||current||Southern leg formerly designated I-193 (1961-1976).|
|I-393||4.594||7.393||US 202 in Concord||US 4/US 202/NH 9 in Pembroke||1979||current||Concurrent with US 4/US 202 the entire length|
- Official Route Numbering for the National System of Interstate and Defense Highways (Map). American Association of State Highway Officials. August 14, 1957. Retrieved November 22, 2010.
- Bureau of Planning & Community Assistance (February 20, 2015). "NH Public Roads". Concord, New Hampshire: New Hampshire Department of Transportation. Retrieved April 7, 2015.
- Media related to Interstate Highways in New Hampshire at Wikimedia Commons