Sarah Mercer
- Born: 1771, Tenterden, Kent
- Christened: 1 August 1771, Tenterden, Kent
- Died: 6 May 1799, Tenterden, Kent aged 28
- Buried: 1799, Tenterden, Kent
 General Notes:
On a gravestone in the Tenterten Churchyard:
In Memory of John Mercer, late of this parish, Yeoman who died 19th July 1806, aged 78 Had issue by Mary his wife John who died 11th July 1759 aged 4 years Sarah who died 6th May 1799 aged 28 Left surviving Robert, Thomas, Mary, Elizabeth, John, Ann, William and Joseph Also of Mary his wife, who died 11th August 1800 aged 75
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