- ThorntonA small village and civil parish in Buckinghamshire, England, previously in Aylesbury Vale district (OS grid ref SP7535).
- thornA modified branch that is hard and sharp like a spike.
- ThorndikeA surname from Old English.
- ThornburyA village and civil parish in Torridge district, Devon (OS grid ref SS4008).
- ThornleyA village and civil parish in County Durham, England (OS grid ref NZ3639).
- ThorleyA village and civil parish in East Hertfordshire district, Hertfordshire, England (OS grid ref TL4719).
- ThorneyA hamlet in Iver parish, south Buckinghamshire, England (OS grid ref TQ0479).
- ThoringtonA small village and civil parish (served by Bramfield and Thorington parish council) in East Suffolk district, Suffolk, England (OS grid ref TM4174).
- ThurnhamA small village and civil parish in Maidstone borough, Kent, England (OS grid ref TQ8057).
- TarbockA village in the Metropolitan Borough of Knowsley, Merseyside, England (OS grid ref SJ4687).