'''N56''' may refer to: == Roads == * N56 road (Belgium) * Route nationale 56, in France * N56 road (Ireland) * N56 highway (Philippines) * Nebraska Highway 56, in the United States
== Other uses == * N-56 (pressure group) a Scottish pressure group * Great Valley Airport, in Cattaraugus County, New York, United States * {{HMS|Grampus|N56}}, a ''Grampus''-class submarine of the Royal Navy sunk in 1940 * {{HMS|Union|N56}}, a U-class submarine of the Royal Navy sunk in 1941
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