ELR

ELR may refer to:

In transportation:

• East Lancashire Railway, a heritage railway in England
• East Lancashire Railway 1844-1859, a former railway in the northwest of England
• East London Railway, see East London Line
• Engineers line reference, an abbreviated code for a section of rail route in the UK
• Cadillac ELR

In other:

• Electronic Laboratory Reporting, a term in Public Health Informatics
• Environmental lapse rate, a term in meteorology
• The Environmental Law Reporter, a publication by the Environmental Law Institute
• Enzyme-linked receptor, a category of receptors involved in cell signalling
• Everybody Loves Raymond, an American television show
• ExtraLife Radio, a radio show created and hosted by cartoonist Scott Johnson.