LHR primarily refers to:

• London Heathrow Airport, IATA airport code: LHR

It may also refer to:

• Lakeside and Haverthwaite Railway
• Lehigh and Hudson River Railway
• Light Horse Regiment, an armoured regiment of the South African Army
• l'Hôpital's rule, a calculus rule for calculating limits of indeterminate forms
• Long homologous repeats, genetic sequences in complement receptor 1
• Lung to head ratio, a factor in the treatment of congenital diaphragmatic hernia
• Laser hair removal
• Al Ahram Aviation, Egypt, ICAO airline code.

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.