Henry Rymill (1 May 1836 – 21 February 1927) and Frank Rymill (27 November 1837 – 26 May 1915) were brothers prominent in business and public service in the 19th century South Australia. Henry "Harry" Rymill and Francis "Frank" Rymill were born in England, sons of Robert Rymill and Louisa (née Sheppard) Rymill of Shepperton, and migrated to South Australia, arriving at Port Adelaide in the Caucasian on 1 October 1855. Their company H & F Rymill was a prominent financial institution well into the 20th century. Their families included a number of prominent Adelaide citizens.