George and Sarah Gammon were activists in the Underground Railroad and owners of the Gammon House, a noted safe house.

The Gammon House is one of the few existing safe houses in Ohio and the country, that was owned by free people of color. George was a sawyer, or carpenter. Sarah was remembered to have fed and clothed runaways in their home, waiting for pick-up and transport northwards to Urbana and Marysville.

George and Sarah Gammon are interred in Section F of Ferncliff Cemetery.