Henderson was born in the Queensland town of Roma in 1929, and until the 2016 Summer Olympics in Rio de Janeiro was the only Olympic athlete from the town.[4] In 1948, Roma Town Council named a street Spencer Street in her honour, being the location of the swimming baths where she learned to swim.[5] In September 1950, she married stock manager and auctioneer George Henderson.[6]
Henderson died on 6 September 1998 at John Flynn Hospital in Tugun on the Gold Coast.[7]
^"DENISE NOW MRS". The Courier-mail. No. 4305. Queensland, Australia. 13 September 1950. p. 3. Retrieved 2 September 2017 – via National Library of Australia.