Lat or LAT may refer to:

• Lat, Fuman, village in Gilan Province, Iran
• Lat, Rasht, village in Gilan Province, Iran
• Lat, Mazandaran, village in Iran
• Lat-e Disar, village in Mazandaran Province, Iran
• Lat, Qazvin, village in Iran

• Los Angeles Times, American newspaper
• LAT TV, American Spanish-language TV network

• Blatta lateralis, a species of cockroach
• LAT (gene), which encodes Linker of Activated T cells
• LAT1, the large neutral amino acid transporter
• Latissimus dorsi muscle, a muscle on the back trunk of the upper body
• Latitude, a coordinate that specifies the north–south position

• Local Area Transport, a non-routable networking technology
• Lam Tin station's MTR station code
• Large Area Telescope, an instrument aboard Fermi Gamma-ray Space Telescope
• Linear approximation table, a concept in cryptanalysis.

• Lat (cartoonist) (born 1951), Malaysian cartoonist
• David Lat (born 1975), American lawyer and blogger

• Al-Lat, a pre-Islamic Arabian goddess
• Latvia's IOC country code
• Latvian lats, the former currency of Latvia (lats is the singular form)
• Living apart together, a term for couples who reside separately
• Lowest astronomical tide, a common chart datum

• Lath (disambiguation)
• Lat. (disambiguation)
• HHV Latency Associated Transcript (HHV LAT), a herpes simplex virus gene