N78 may refer to:
Roads
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N78 road (Ireland)
The N78 road is a national secondary road in Republic of Ireland, Ireland. The road links the N77 road (Ireland), N77 national secondary road north of Kilkenny, County Kilkenny to the M9_motorway_(Ireland), M9 Roads in Ireland, national primar ...
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Ozamiz–Pagadian Road, in the Philippines
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Nebraska Highway 78, in the United States
Other uses
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N78 (Long Island bus)
* , a submarine of the Royal Navy
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Mangarrayi language
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Nokia N78, a smartphone
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