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