Clement Clarke Moore (1779–1863) was a professor of Oriental and Greek literature at New York's General Theological Seminary from 1823 to 1850. He also donated a large piece of land that he had inherited, located in Manhattan's Chelsea neighborhood, to the seminary. Moore wrote on a variety of topics but is best known today as the author of the enduringly popular Christmas poem, "A Visit from St. Nicholas." The poem was first published anonymously in 1823 and there has been debate over its true authorship; many scholars believe it was actually written by Henry Livingston, Jr., but decisive proof has been elusive. The poem became a classic popularly known as "The Night Before Christmas” and brought the idea of Santa Claus to mainstream culture. Moore died in Newport, Rhode Island in 1863.

The Moore family was among the earliest settlers of Elmhurst, Queens, having been granted 80 acres there in the mid-1600s; Clement Moore spent much of his childhood at the family estate in Newtown. The Moore Homestead Playground, also in Elmhurst, is named in the family's honor. Prior to the colonization of Elmhurst, the land was considered part of the Canarsie and Munsee Lenape territories.