N6 may refer to:

• 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)

• 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

• 6N (disambiguation)

N06 may refer to :

• ATC code N06 Psychoanaleptics, a subgroup of the Anatomical Therapeutic Chemical Classification System
• Isolated proteinuria with specified morphological lesion ICD-10 code
• Laurel Airport (Delaware), FAA Location Identifier: N06
• N°6, a shortening for Number Six