Sophia Hay, Viscountess Melgum (died 1642) was a Scottish noblewoman.
She was a daughter of Francis Hay, 9th Earl of Erroll and Elizabeth Douglas.
[1] She married John Gordon, Viscount Melgum, who died in the fire at Frendraught in October 1630.
Sophia Hay features in Gilbert Blackhall's, A Breiffe Narration of the Services Done to Three Noble Ladyes.
Blackhall, a Catholic priest, met her in 1637, and joined her household at Aboyne Castle.