LIR or Lir may refer to:

• Ler (mythology), sea god in Irish mythology, also known as Lir

• Liberia, UNDP country code LIR

• Lir (band)

• Lir, Chaharmahal and Bakhtiari, a village in Chaharmahal and Bakhtiari Province, Iran

• Lir Abi (disambiguation), villages in Chaharmahal and Bakhtiari Province, Iran

• Lir-e Shamlek, a village in Chaharmahal and Bakhtiari Province, Iran

• Lir, Masal, a village in Gilan Province, Iran

• Lir, Talesh, a village in Gilan Province, Iran

• Lir, Hormozgan, a village in Hormozgan Province, Iran

• Lir-e Bozorg, a village in Kohgiluyeh and Boyer-Ahmad Province, Iran

• Lir-e Kuchek, a village in Kohgiluyeh and Boyer-Ahmad Province, Iran

• Lir Tahrak, a village in Kohgiluyeh and Boyer-Ahmad Province, Iran

• Lir, Markazi, a village in Markazi Province, Iran

• Local Internet registry

• London Irish Rifles, reserve infantry regiment and then company of the British Army

• IATA airport code for Daniel Oduber Quirós International Airport in Costa Rica