NNG

NNG may refer to:


 * Nar Nar Goon railway station, Australia
 * National Number Group, U.K. telephone numbering scheme
 * Nielsen Norman Group, usability consultancy firm based in Fremont, California, U.S.
 * NNG (company), Hungary-based company, developer of the iGO navigation software
 * Newark North Gate railway station, in England
 * Nanning Wuxu International Airport, IATA code
 * N'n'G, a pseudonym of English house/garage duo Grant Nelson and Norris 'Da Boss' Windross
 * Netherlands New Guinea, now known as Papua and West Papua provinces of Indonesia
 * NNG (software), "Nanomsg Next Generation", a Nanomsg message-passing project