Source:Cutter, William Richard. New England Families, Genealogical and Memorial, p. 4:2243: "There is no name more numerously represented in the pioneer settlement of New England than this. The many families bearing it render distinctions somewhat confusing and uncertain."

The Clarks and their Descendants notes that "The census of 1790 reported 2,422 "Clarks" as the heads of families in America."