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.
| Interstate Highways of the New Hampshire Highway System | |
|---|---|
Highway marker for Interstates 93 and 293
| |
Interstate Highways highlighted in red
| |
| System information | |
| Formed | August 14, 1957[1] |
| Highway names | |
| Interstates | Interstate nn (I-nn) |
| System links | |
| Number | Length (mi)[2] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
|---|---|---|---|---|---|---|---|---|
 I-89
|
60.864 | 97.951 | I-93 & NH 3AinBow | I-89 at Hartford, VT | 01967-01-011967 | current | Highway continues north into Vermont. | |
 I-89 BL
|
3.9 | 6.3 | I-89atEnfield | I-89atLebanon | 01968-01-011968 | 02000-01-012000 | 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 Methuen, MA | I-93 at Waterford, VT | 01957-01-011957 | 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-95atSalisbury, MA | I-95at Kittery, ME | 01957-01-011957 | current | Tolled as the New Hampshire Turnpike. Continues south into Massachusetts and north into Maine. | |
 I-193
|
3.291 | 5.296 | I-93/NH 101inManchester | Everett Tpk.inBedford | 01961-01-011961 | 01976-01-011976 | Southern leg of what is now designated I-293. | |
 I-293
|
11.771 | 18.944 | I-93/NH 101inManchester | I-93/Everett Tpk.inHooksett | 01976-01-011976 | current | Southern leg formerly designated I-193 (1961-1976). | |
 I-393
|
4.594 | 7.393 | US 202inConcord | US 4/US 202/NH 9inPembroke | 01979-01-011979 | current | Concurrent with US 4/US 202 the entire length | |
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Media related to Interstate Highways in New Hampshire at Wikimedia Commons
