The abbreviation NNN can stand for:
- The ticker symbol on the New York Stock Exchange for National Retail Properties, Inc., a real estate investment trust that owns single tenant, net-leased retail properties throughout the United States.
- Newspaper National Network LP, a marketing partnership of the top 25 newspaper companies in America and the Newspaper Association of America.
- Northwestern News Network, a Student television station at Northwestern University.
- NAM News Network, a news network set up by Non-Aligned countries
- Nippon News Network - Japanese television news network
- New Nordic Norm, a type of binding for cross-country (Nordic) skis.
- N-Nitrosonornicotine, a nitrosamine carcinogen found in tobacco
- Norsk Naerings- og Nytelsesmiddelarbeiderforbund, the Norwegian Union of Food, Beverage and Allied Workers
- Triple Net Lease, a lease agreement where the renter is responsible for property taxes, insurance, and maintenance charges.
- Neal 'n' Nikki, a 2005 Indian movie starring Uday Chopra and Tanisha and was directed by Arjun Sablok.
- Naomi Nari Nam, a figure skater often referred to by her initials.
- No Nigga' Nonsense, a term coined by Alec Burks