An era is a span of time.

Era or ERA may also refer to:

• Era (geology), a subdivision of geologic time
• Calendar era

• Academy of European Law (German: Europäische Rechtsakademie), an international law school
• ERA School, in Melbourne, Australia
• Era University, in Lucknow, India

• Earned run average, a baseball statistic
• Elite Rodeo Athletes, a professional rodeo organization
• English Racing Automobiles, a manufacturer of racing cars
• Era Basket Liga (EBL), name of Polish Basketball League due to sponsorship reasons in 2003–2005

• Era (publisher), a Bulgarian publishing house
• Era (radio station), in Malaysia
• Era Television, a Taiwanese television network
• Improvement Era, a defunct magazine of The Church of Jesus Christ of Latter-day Saints
• Hellenic Radio, the main public radio broadcaster in Greece
• The Era (newspaper), a defunct British weekly
• TV Era, a television channel in North Macedonia

• Era (musical project), a New Age music project by French composer Eric Lévi
  • Era (Era album), 1996
• Era (Disappears album), 2013
• Era (Echo Lake album), 2015
• Era (Elvenking album), 2012
• The Era (album), by Jay Chou
• Era, a 2007 album by In the Nursery
• "Era" (song), Italy's entry to the Eurovision song contest 1975
• Era Records, an American record label

• Era. Anbarasu, Indian politician
• Era Bell Thompson (1905–1986), American journalist
• Era Bernard, Indian politician
• Era Istrefi (born 1994), Albanian musician
• Era Natarasan (born 1964), Indian writer
• Era Ziganshina (born 1944), Soviet and Russian film and stage actress

• Era (river), of Tuscany in Italy
• Era, Ohio, United States
• Era, Texas, United States
• Era (reservoir), Ethiopia
• Era Quhila, another reservoir in Ethiopia

• Electricity Regulatory Authority, of the Government of Uganda
• Electronic Records Archives, of the United States National Archives and Records Administration
• Environment and Resources Authority, a government agency of Malta
• European Radical Alliance, a defunct political group in the European Parliament
• European Union Agency for Railways
• Excellence in Research for Australia, a research assessment initiative of the Australian Government

• Education Reform Act (disambiguation), or specifically
  • Education Reform Act 1988 of the Parliament of the United Kingdom
  • Kentucky Education Reform Act
  • Massachusetts Education Reform Act of 1993
• Emergency Relief Appropriation Act of 1935 of the United States Congress
• Employee Rights Act, proposed legislation in the United States Congress
• Employment Relations Act 2000 of the Parliament of New Zealand
• Employment Rights Act 1996, of the Parliament of the United Kingdom
• Equal Rights Amendment, a proposed, but unratified, amendment to the United States Constitution
  • State equal rights amendments, similar laws passed in various U.S. states

• Earth rotation angle in astrometry
• ECMWF re-analysis in meteorology
• Eigensystem realization algorithm
• Electronic Reactions of Abrams, a discredited medical theory of Albert Abrams
• Elementary recursive arithmetic
• ERA (command), a file erase command under CP/M and DR-DOS
• European Research Area, a system of scientific research programmes
• European Robotic Arm, on the International Space Station
• Exobiology Radiation Assembly, an experiment in Earth orbit
• Explosive reactive armour
• EraMobile

• Era Alaska, now Ravn Alaska, an American airline
• Era Aviation, a defunct American airline
• Eastham Rake railway station, in England
• Electric Raceabout, a Finnish electric sports car
• European Regions Airline Association, a trade association
• Winnebago Era, a motorhome

• Educational Research Analysts, an organization created by Mel and Norma Gabler
• Electricity Regulatory Authority, a Uganda government electricity regulatory agency.
• Electronic remittance advice
• Energy Resources of Australia, an Australian mining company
• Energy Retail Association, a trade association in Great Britain
• Engine room artificer, a Royal Navy position
• Engineering Research Associates, a defunct American computer manufacturer
• Entrepreneurs Roundtable Accelerator, an American startup accelerator
• Equal Rights Advocates, an American women's rights organization
• Equal Rights Association, a defunct American suffrage organization
• ERA Productions, an American animation studio
• ERA Real Estate, an American real estate franchise
• Eramet, a French multinational mining and metallurgy company
• European Rental Association, a trade association

• Eras (disambiguation)