NAD may refer to:
- No apparent distress, a status description in childbirth
- NAD Electronics, a Canadian audio equipment manufacturer (originally New Acoustic Dimension)
- Namibian dollar, the currency of Namibia
- National Advertising Division
- National Appeals Division, an agency within the United States Department of Agriculture
- National Association of the Deaf, a non-profit advocacy organization
- Ned's Atomic Dustbin, a British Rock Band
- Network Access Device, a device in mobile phones that finds the shortest route for a connection
- New Age Diamonds, a company producing cultured and synthetic diamonds of new age
- Nicotinamide adenine dinucleotide, or NADH, a coenzyme and signaling molecule, whose oxidized form is NAD+
- North American Datum, a series of geographic coordinate systems
- North Atlantic Drift (also known as North Atlantic Current), an Atlantic ocean current; also the name of a Canadian Celtic music ensemble
- Norwegian Association of the Disabled
- Nad, County Cork, a village in Ireland
- Noradrenalin, a hormone and neurotransmitter
- The singular of Nads, a slang term for testicles deriving from the word gonad.