- longHaving much distance in space from one end to the other.
- langleyA unit of heat transmission in the CGS system of units. It is equivalent to 41,840 J/m² in SI units. Symbol: Ly.
- LangdonA habitational surname from Old English.
- LangstonA habitational surname from Old English.
- LandonA habitational surname from Old English.
- LangfordA village and civil parish in Central Bedfordshire district, Bedfordshire (OS grid ref TL1840).
- LongfordA village and civil parish in Derbyshire Dales district, Derbyshire (OS grid ref SK2137).
- LanghamA hamlet in Gillingham parish, Dorset (OS grid ref ST7725).
- LongworthA village in Oxfordshire, England (historically Berkshire).
- LangdaleA surname.
- LongbottomA surname from Old English.
- LongfieldA village in Longfield and New Barn parish, Dartford borough, Kent, England (OS grid ref TQ604688).
- langridgeA hamlet in Charlcombe parish, Bath and North East Somerset district, Somerset, England (OS grid ref ST7469).
- LongdenA village and civil parish in Shropshire, England, south-west of Shrewsbury (OS grid ref SJ4406).
- LangworthyA surname from Old English.
- LongdonA village and civil parish in Lichfield district, Staffordshire, England (OS grid ref SK0714).
- LangdownA surname from Old English.
- LangthorneA village and civil parish (served by Crakehall with Langthorne Parish Council) in Hambleton district, North Yorkshire, England (OS grid ref SE2591).