N51 may refer to:
Roads
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N51 road (Ireland)
The N51 road is a national secondary road in Ireland.
West to east, it starts in Delvin, County Westmeath at a junction with the N52. It passes through Athboy, a junction with M3 motorway, Navan and Slane, where it crosses the N2 road, all i ...
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N51 road (Luxembourg)
The N51 is a road in Luxembourg City, in southern Luxembourg. It is one of the city's main thoroughfares, carrying traffic from Ville Haute, through Kirchberg, to a junction with the A1. For the north-eastern three quarters of its length, on th ...
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Santiago–Tuguegarao Road
Santiago–Tuguegarao Road is a major national primary road in the provinces of Cagayan, Kalinga (province), Kalinga, and Isabela (province), Isabela in the Philippines. It is a bypass road of the Pan-Philippine Highway, also known as Cagayan Val ...
, in the Philippines
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Nebraska Highway 51
Nebraska Highway 51 is a highway in eastern Nebraska. It has a length of and runs from west to east. It has a western terminus at U.S. Highway 275 northwest of Wisner and an eastern terminus at the Burt County Missouri River Bridge at the Mi ...
, in the United States
Other uses
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N51 (Long Island bus)
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Solberg–Hunterdon Airport, in Readington Township, New Jersey, United States
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