TNU

TNU may refer to:


 * Tajik National University
 * Tavrida National V.I. Vernadsky University, Ukraine
 * Televisión Nacional Uruguay
 * Tianjin Normal University, China
 * Thái Nguyên University, Vietnam
 * Trevecca Nazarene University, United States
 * Tungnan University, Taiwan
 * Newton Municipal Airport (Iowa), with FAA code "TNN"
 * Terrestrial Neutrino Units, a measurement of geoneutrinos
 * The Neotia University, Bengal, India