Davis was born January 21, 1956, in Wareham, Massachusetts. Her mother, Lucille (née Cook; June 19, 1919 – November 15, 2001), was a teacher's assistant, and her father, william F. Davis (November 7, 1913 – April 2, 2009), was a civil Engineer and church deacon; her parents were both from small towns in Vermont. She has an older brother named Danforth ("Dan").