Simms married Jane Faulkner (c. 1829 – 28 August 1905). They had four sons (one, William, died aged three) and three daughters: • Alfred Simms (c. 1853 – 30 May 1901) married Priscilla Chambers (ca.1854 – 17 November 1924), daughter of
John Chambers, on 17 June 1874. He was a member of the
Adelaide Stock Exchange, and in 1887 with partner
W. B. Rounsevell took over Johnston & Furniss, the
Grenfell Street wine and spirit merchants, to form Rounsevell & Simms, which in February 1888 joined with the
Kent Town Brewery and the
West End Brewery to form The
South Australian Brewing, Malting, and Wine and Spirit Company. Substantial additions (
reredos,
lady chapel,
vestries, arches and apse) were made to
St. Peter's Cathedral,
North Adelaide in memory of Alfred Simms by his wife. • Harry Simms was a member of the
Melbourne Stock Exchange. Around 1900 he left Australia to live in
Hampstead, England. • Clara Jane Simms (1855 – ) married solicitor Paul Frederick "Fred" Bonnin (died 14 September 1901) on 25 December 1876. :She married again, to
Whitmore Blake Carr (died August 1943), on 2 June 1904. • Elinor/Eleanor Ann Simms (1857 – 2 February 1900) married Alexander Frederick Fisher of
Croydon on 25 November 1879. She divorced him in 1887. She married again, to solicitor Charles Grant Varley on 5 May 1888. • Louisa Simms (c. 1857 – 24 April 1910) married Cavendish Lister Colley (c. 1848 – 14 April 1906), son of
R. B. Colley on 12 December 1883. • Edward "Ned" Simms (c. 1864 – 1 September 1909) married Emma Louise "Louie" Noltenius, daughter of
Henry Noltenius on 8 May 1890. They lived at Victoria Place,
Glenelg, overlooking
Colley Reserve. Simms suffered greatly from rheumatism in later life and made trips to the spas of Germany and New Zealand seeking relief. His end though, was swift and he was buried in
St Jude's Church cemetery , Brighton. A stained glass window (depicting St Mark, the Evangelist) in St. Peter's Church, Glenelg, is dedicated to his memory. ==Estate==