Creator
Dave Cockrum, Len Wein
  
Karl Kesel, Tom Grummett
  
Base
(current) Professor Charles Xaviers Institute for Higher Learning, Salem Center, Westchester County, New York (former) Muir Isle, Scotland,; a loft in Soho, Manhattan, Ust-Ordynski Collective, Lake Baikal, Siberia, U.S.S.R., X-Men Headquarters in Austra
  
San Francisco; Smallville; Formerly Metropolis; Formerly Honolulu