'''Thorndon''' may refer to:

==People== * Giles Thorndon ({{circa}}1388–1477), official of the English Crown * Robin Cooke, Baron Cooke of Thorndon (1926–2006), New Zealand judge and member of the British House of Lords

==Buildings and places== ;New Zealand * Thorndon, New Zealand, suburb of Wellington :* Thorndon Railway Station, former railway station :* Thorndon School, primary and intermediate school :* Thorndon (New Zealand electorate), New Zealand general electorate

;United Kingdom * Aspall and Thorndon railway station, former railway station on the Mid-Suffolk Light Railway * Thorndon Hall, Georgian Palladian country house in Ingrave, Essex :* Thorndon Park Chapel, former Roman Catholic private chapel in the grounds of Thorndon Hall * Thorndon, Suffolk, village and civil parish in Suffolk

==Other== * Thorndon Mile, Thoroughbred horse race in Wellington, New Zealand

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