Born in Watford in 1893, Sidney William Hinton was the fourth in a family of five children born to Charles Hinton, a house painter, and Fanny (née Mattingley) Hinton. His parents were married on 24 December 1887 at St James Church, Bushey, Herts. Fanny died in 1927, aged 59, and was buried on 12 March at St James, Bushey. Charles died on 27 July 1927, aged 61, and was buried on 30 July, also at St James.
At the 1901 Census, 7-year-old Sidney was living at 12 Vale Road, Bushey with his 35-year-old father, a house painter, and 34-year-old mother. He had three brothers and a sister; Charles (Jnr.), Frances, Arthur and Frederick. Their ages were 13, 11, 9 and 4 respectively. Birthplaces for those present are given as Bushey for Charles (Snr.) and Frederick, Heston, Middlesex for Fanny and Watford for all of the other children.
At the 1911 Census, the family were at the same address. Charles (Snr.) was still employed as a house painter in the building trade. Charles (Jnr.) was a shop assistant, Frances a domestic daily girl, Arthur a bricklayer & student in the building trade and Sidney was an Assistant for a Mineral Water Manufacturer. Frederick was still at school.