DNO may refer to:
The Danish Nurses' Organization, a trade union for nurses in Denmark
Director of Naval Ordnance, British Admiralty administration
Distribution Network Operator, companies licenced to distribute electricity in Great Britain
Dno (air base), a former air base in Russia located 4 km south of Dno
DNO International, a Norwegian oil company
Drang nach Osten, a term coined in the 19th century to designate German expansion into Slavic lands
Dutch National Opera, based in Amsterdam, The Netherlands
Dno ( Дно) is a town and the administrative center of Dnovsky District of Pskov Oblast, Russia, located 113 km east of Pskov, at the intersection of two railways: Pskov– Bologoye and St. Petersburg– Kiev. Municipally, it is incorporated as Dno Urban Settlement in Dnovsky Municipal District.
Dno, or Grivochki (rus.- аэродром Гривочки, germ. - FlugPlatz Griwotschki) is a former air base in Russia located 4 km south of Dno. It is an abandoned military airfield. Little trace remains except a clearing.