First Mesa (Hopi: Wàlpi) is a census-designated place (CDP) in Navajo County, Arizona, United States, on the Hopi Reservation. As of the 2000 census, the CDP population was 1,124, spread among three Hopi and Arizona Tewa villages atop the 5,700-foot (1,740 m) mesa: Hano (or Tewa, Arizona), Sitsomovi (or Sichomovi), and Waalpi (or Walpi).