AMB may refer to:

• Active magnetic bearing
• Advanced Memory Buffer, used in Fully Buffered DIMM memory
• Al-Aqsa Martyrs Brigades, one of the armed sections of the Palestinian Fatah movement
• Ambergate railway station, abbreviation used in the (UK) National Rail code
• Ambilobe Airport, an airport serving Ambilobe, a city in the Antsiranana province in Madagascar by IATA airport code
• American Medical Bureau, a humanitarian institution operating during the Spanish Civil War
• Amphotericin B, an anti-fungal drug
• Àrea Metropolitana de Barcelona, public body in Barcelona
• Axe Murder Boyz, a two-man rap group Otis & Bonez Dubb
• A US Navy hull classification symbol: Auxiliary base minesweeper (AMb)

Amb may refer to:

• Amb (Dadyal), a town in the Azad Kashmir territory, Pakistan
• Amb (princely state), a region in the former Pashtun Tanoli empire
• Amb, India, a town of the Himachal Pradesh State, India
• Amb, Pakistan, a village in the Khyber Pakhtunkhwa province of Pakistan
• Amb special form, a nondeterministic programming construct