BER may refer to:

• Basal electrical rhythm, spontaneous rhythmic slow action potentials that some smooth muscles of the GI tract display
• Base excision repair, a DNA repair pathway
• Benign early repolarization, a heart arrhythmia
• Blossom end rot, a plant disorder

• Basic Encoding Rules, a set of rules for encoding data
• Bit error rate, the ratio between the number of incorrect bits transmitted to the total

• Bermuda (IOC and UNDP code), a British overseas territory
• Bohai Economic Rim, the economic region surrounding Tianjin, China

• Air Berlin (ICAO code: BER), a defunct German airline
• Berlin Brandenburg Airport (IATA code: BER), Germany
• Berlin station (Connecticut) (Amtrak code: BER), United States

• Beyond economic repair, a rating of a damaged item
• Block Exemption Regulation, published by the European Commission regarding European Union competition law
• Building the Education Revolution, a 2010 Australian government economic stimulus programme
• Building Energy Rating, a rating label for the energy performance of a building in Ireland
• Chemische Berichte (Ber), a 1868–1945 German chemistry journal
• B.E.R., a band best known for their single "The Night Begins to Shine"

• Ber (disambiguation)