Fact: Census (1940) Ward 48, Chicago, Chicago City, Cook, Illinois, United States
Fact: Marital Status Single
Fact: Residence (1935) , ,
"United States Census, 1940," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K49S-JPP : 14 March 2018), Gary Gygax in household of Ernest Gygax, Ward 48, Chicago, Chicago City, Cook, Illinois, United States; citing enumeration district (ED) 103-3108, sheet 12B, line 54, family 343, Sixteenth Census of the United States, 1940, NARA digital publication T627. Records of the Bureau of the Census, 1790 - 2007, RG 29. Washington, D.C.: National Archives and Records Administration, 2012, roll 1019.