NGI may refer to:

• NGI Airport or Gau Airport, an airport in Fiji
• National Geographic Institute (Belgium), the Belgian national mapping agency
• Navigazione Generale Italiana, an Italian shipping company
• Next Generation Identification, a project of the US Federal Bureau of Investigation (FBI)
• Next generation interceptor (NGI)
• Next Generation Internet (disambiguation)
• Northern Gulf Institute, a US National Oceanic and Atmospheric Administration (NOAA) Cooperative Institute
• Norwegian Geotechnical Institute, a private geoscience research and consulting foundation
• National Genetics Institute, genetics laboratory co-founded by Andrew Conrad
• Nehemiah Global Initiative, a non-governmental organization founded by Kenneth Bae