She attended the Slade School of Fine Art, London from 1900 to 1902. She then enrolled at the Académie Colarossi in Paris from 1902 to 1906 and was befriended by Auguste Rodin. On her return to London, she became acquainted with George Bernard Shaw, Max Beerbohm and J.M. Barrie.
She sculpted a statue of her first husband, Antarctic explorer Robert Falcon Scott, of which there are two versions: a bronze statue erected in Waterloo Place, London, in 1915 and a replica in white marble located in Christchurch, New Zealand, put up in 1917.  A plaque to Scott is on the exterior of the Scott Polar Research Institute in Cambridge with a statue of "Youth" (1920), for which the model was A.W. Lawrence, younger brother of T. E. Lawrence (better known as "Lawrence of Arabia").
She also produced a small bronze of the Indian actor Sabu which is now missing, after a theft.
She married the Antarctic explorer Captain Robert Falcon Scott, R.N., on 2 September 1908, and a year later gave birth to their son Peter Scott, who became famous in broadcasting, ornithology, painting, conservation and sport. In 1910, she accompanied her husband to New Zealand to see him off on his journey to the South Pole. A biographer of the Norwegian explorer Fridtjof Nansen has suggested that, in her husband's absence, she began a brief affair with Nansen, the mentor of Scott's rival Amundsen. In February 1913, while sailing back to New Zealand to greet Scott on his return, she learned of his death in Antarctica in March 1912.
In 1922, she married the politician Edward Hilton Young. Her second son, Wayland Hilton Young (1923–2009) was a writer and politician. Her grandchildren include Emily Young, artist, and Louisa Young, writer.
She was a member of the International Society of Sculptors, Painters and Gravers.
In 1913, she was granted the rank (but not the style) of a widow of a Knight Commander of the Order of the Bath. This meant that, for the purposes of establishing official precedence, she was treated as if she were the widow of such a knight. However, she was not entitled to be called Lady Scott merely by virtue of this, and it did not amount to Captain Scott being posthumously knighted.
When her second husband was created Baron Kennet on 15 July 1935, she gained the title Baroness Kennet.
- Christchurch Art Gallery
- Louisa Young, A Great Task of Happiness. The Life of Kathleen Scott. Macmillan, London, 1995
- From "The Eye of the Wind"
- "The Rolls Memorial at Dover"Flight 4 May 1912
- Huntford, Roland (2001). Nansen London: Abacus, pp. 566-568. ISBN 0-349-11492-7. (First published in 1997 by Gerald Duckworth)
- "The International Society of Sculptors, Painters and Gravers". Mapping the Practice and Profession of Sculpture in Britain and Ireland 1851-1951. Glasgow University. Retrieved 31 May 2013.
|Wikimedia Commons has media related to Kathleen Scott.|
- A Great Task of Happiness: The Life of Kathleen Scott, ISBN 0-333-57838-4 (1995) - Louisa Young
- A Father for my Son (biographical play, premiered 2000) - Jenny Coverack