Sidney Thomas Strong was born around 1879 in Birmingham, Warwickshire.

Sidney married Alice Zillah Griffin in 1904 in Solihull, Warwickshire.

He had the following children from his marriage to Alice Zillah Griffin:

- Ethel Zillah Strong	born on 6 October 1904 at King's Heath, Birmingham, Warwickshire.
- William Henry Strong	born in 1906 at King's Heath, Birmingham, Warwickshire.
- Norah Alice Strong	born in 1908 at King's Heath, Birmingham, Warwickshire.
- Aileen M E Strong	born in 1920 at King's Norton, Birmingham, Warwickshire.

Sidney was a Coal Merchant.

Sidney died in 1959 in Birmingham, Warwickshire.