N5

N5 or N-5 may refer to:

Science and technology

 * N5, the minimal non-modular and non-distributive lattice in mathematical order theory
 * N5, abbreviation for the 5 nanometer semiconductor technology process node

Other uses

 * N°5, a shortening for Number Five, see Number Five (disambiguation)
 * ASEA N-5, rolling stock used on the SEPTA Norristown High Speed Line
 * LNER Class N5, a class of British steam locomotives
 * London Buses route N5
 * Nexus 5, an Android smartphone
 * N5, a postcode district in the N postcode area, North London, England
 * SP&S Class N-5, a steam locomotives class, used by the Spokane, Portland and Seattle Railway
 * USS N-5 (SS-57), a 1917 N-class coastal defense submarine of the United States Navy
 * The first level in the Japanese-Language Proficiency Test
 * "N5" (song), by Lali, 2022