MB

• Mälarhöjden/Bredäng Hockey, a Swedish ice hockey club
• Manila Bulletin, a newspaper based in the Philippines
• Media Blasters, an American multimedia entertainment distributor
• Mediobanca, an Italian company with Borsa Italiana stock symbol MB
• Mercedes-Benz, a German brand of automobiles, buses, coaches and trucks
• Milton Bradley Company, a board-game and sometime video-game publisher
• Multibanco, a Portuguese interbank network
• Muslim Brotherhood, a pan-Islamic movement

• Lee Myung-bak (born 1941), former president of South Korea
• Maurizio Bianchi (born 1955), Italian composer of industrial music
• Mario Balotelli (born 1990), Italian footballer
• Mahesh Babu (born 1975), an actor in Indian Telugu cinema

• Manitoba, province of Canada
• Monza and Brianza, Italy

• Megabyte (MB), a measure of information
• Megabit (Mb or Mbit), a measure of information
• MikroBitti (formerly MB), a Finnish computer magazine
• Mega base pairs, a unit of measurement in genetics
• Megabar (Mbar) and Millibar (mbar), a unit of pressure
• Body wave magnitude (m{{sub|b}}), a seismic scale
• Megabarn (Mb) and millibarn (mb), units of cross-sectional area
• Millibel (mB), a hundredth of a decibel (rarely used)
• moisture basis, a way to measure percentages of components in a chemical composition
• Myoglobin, a compound in blood
• 2-Methylbut-3-yn-2-ol, a reagent in organic synthesis
• Willys MB, the WWII-era Jeep

• Bachelor of Medicine, an academic degree ({{lang|la|Medicinae Baccalaureus}})
• Magandang Buhay, Philippine morning talk show
• mb (digraph), a combination of letters used in spelling
• Medal of Bravery (Canada), a military decoration
• {{anl|Monetary base}}
• MusicBrainz, an online open data music database
• Tokyo Metro Marunouchi Line, a subway service operated by the Tokyo Metro

• Myrtle Beach, South Carolina

{{disambiguation}}