ERA is an abbreviation for several different things, including:

• the Equal Rights Amendment, a proposed, but unratified, Constitutional amendment in United States
• Earned run average, a baseball statistic
• Engine Room Artificer
• Education Reform Act
• Engineering Research Associates, a pioneering computer firm from the 1950s
• Academy of European Law Trier
• Explosive reactive armour
• English Racing Automobiles, a British manufacturer of racing cars.
• European Robotic Arm, a robot arm for use on the International Space Station
• ERA Real Estate , the initials for that company originally stood for Electronic Reality Associates.