Catherine "Kit" Ryan, RRC (née McNaughton; March 1884 – 14 February 1953) was a decorated Australian nurse who served in the First World War.

She kept a detailed diary of her experiences, the basis of which was later published by Janet Butler as Kitty's War (2013).

McNaughton was mentioned in despatches in 1917,[1] and awarded the Royal Red Cross in 1919.

[2] McNaughton's diaries were the subject of the 2013 book Kitty's War, written by historian Janet Butler.

[3][4] Her war experiences also formed the basis of the characters in the ANZAC Girls television series.