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