ECR

• Efficient Consumer Response, a trade and industry body
• US Institute for Environmental Conflict Resolution
• European Conservatives and Reformists Party, a European political party
• European Conservatives and Reformists, the affiliated European Parliament group
• European Centre for Restoration Techniques (ECR)

• East Coast Radio (South Africa), a South African radio station (FM 94-95)
• East Coast Radio (Ireland), an Irish radio station

• East Central Railway zone, part of the Indian rail network
• East Coast Rail, Australian rail freight operator

• East Coast Road, a scenic beachway along the Coromandel coast of South India
• East Cross Route in London
• East Croydon station, a railway station and tram stop in Croydon, England
• Euro Cargo Rail, rail freight operator based in France
• Route ECR, SamTrans bus route, San Mateo County, California, United States

• Electron cyclotron resonance, a phenomenon in physics
• European Congress of Radiology

• Electrical contact resistance, the surface-structure-dependent resistance at a contact interface
• Engineering Change Request, a request for a change in the specification(s) - see Change request or Engineering change order

• Early Career Researcher
• ECR Engines, the engine-building division of Richard Childress Racing
• Ed Carpenter Racing, an American racing team in the IndyCar Series
• Electronic Cash Register
• El Camino Real (disambiguation)
• Engine control room, shipbuilding abbreviation

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