Dame Sophia Gertrude Wintz DBE (1847–16 January 1929) was a Swiss-born British philanthropist who co-founded the Royal Sailors' Rests.

In the 1870s they began to hold Sunday afternoon meetings at Wintz's mother's house for boys from the training ships at Devonport.

They also founded the Royal Naval Temperance Society and established journals, Monthly Letters and Ashore and Afloat, and a library for sailors which distributed literature to ships all over the world.

She was appointed Dame Commander of the Order of the British Empire (DBE) in the 1920 civilian war honours.

She was given a full naval funeral at Devonport Dockyard Church attended by four hundred officers and ratings of the Royal Navy and was buried next to Weston.