N6

N6 may refer to:

Roads

 * N6 (Bangladesh)
 * N6 road (Belgium), a National Road in Belgium connecting Brussels over Halle, Soignies, and Mons
 * N6 road (France)
 * N6 road (Gabon)
 * N6 road (Ghana)
 * N6 road (Ireland)
 * N6 road (Luxembourg)
 * N6 road (Senegal)
 * N6 road (South Africa), a national road connecting East London and Bloemfontein
 * N6 road (Switzerland)

Other

 * N6 (Long Island bus)
 * N6, a postcode district in the N postcode area
 * N6, TSMC's 6 nm semiconductor fabrication node
 * SP&S Class N-6, a steam locomotives class
 * USS N-6 (SS-58), a 1917 N-class coastal defense submarine of the United States Navy
 * Neapolitan sixth, a chord in music
 * N6, the chemical formula of hexazine
 * N6, the molecular formula of a high pressure nitrogen form
 * LNER Class N6, a class of British steam locomotives