Dame Elizabeth Periam Gass, Lady Gass DCVO JP (née Acland-Hood; born 2 March 1940) was Lord-Lieutenant of Somerset from 1998 to 2015.
The eldest daughter and co-heiress of the Hon. John Acland-Hood, a barrister and his wife, Phyllis (née Hallett), Elizabeth Acland-Hood was educated at Cheltenham Ladies' College and Girton College, Cambridge. Her father was himself a younger son of Alexander Fuller-Acland-Hood, 1st Baron St Audries.
Having graduated from the University of Cambridge, Acland-Hood worked as a schoolteacher, teaching mathematics. In 1967 she inherited from an uncle her family's ancestral seat, Fairfield House, near Stogursey, Somerset, and gave up her teaching career to concentrate on managing the estate which came with it.
In 1975, she married Sir Michael Gass KCMG, who died in 1983. He was a former High Commissioner for the Western Pacific (1969–71) and Governor of the Solomon Islands (1969–73), and they had no children.
In 1985, two years after being widowed, Gass was elected to Somerset County Council, as a Conservative Party Councillor for the district, and remained a member until 1997.