LFR can refer to:

• Lead cooled fast reactor
• Leavine Family Racing
• Low Frequency radio range
• Louisville Division of Fire, known as Louisville Fire & Rescue

• Urdu films
• Urdu-Hindi Belt
• Urdu hip hop
• Urduja House
• Urdu music
• Urdu Poetry
• Urdu Point
• Urdupoint
• Urdu pop
• Urdu pop music
• Urdu rap
• Urdu rock
• Urdu songs recorded by Shreya Ghoshal
• Urdu studies
• Urdu University
• Urduña
• Urdva Dhanurasana
• Urea-1-carboxylate amidohydrolase
• Urea amidohydrolase
• Urea:carbon-dioxide ligase (ADP-forming)
• Urea, (carboxymethyl)-
• Urea cycle disorder
• Urea cycle disorders
• Urea, electrolytes, creatinine
• Urea-formaldehyde foam insulation