In the 1910 US Census for District 61, Phoenix Ward 3, Phoenix, Maricopa County, Arizona George C. Barnum was enumerated at his place of business as follows:
Building #93; Family (Group) #112 (32 West Washington Street)
Barnum, G. C.; Partner; M; W; 27; Single; b. Illinois; Both Parents b. Illinois; Speaks English, Awning maker; Wage earner; Can read and write
World War I Draft Registration Cards, 1917-1918 about George Claire Barnum. Name: George Claire Barnum; City: Phoenix; County: Maricopa; State: Arizona; Birth Date: 3 Dec 1883; Race: White; Roll: 1522450; DraftBoard: 0; Age: 35; Occupation: Merchant; Nearest Relative: Margaret C. Barnum (wife); US Citizen: Native Born.
In the 1920 US Census for District 61, Phoenix Ward 3, Phoenix, Maricopa County, Arizona the family of George C. Barnum was enumerated as follows:
Dwelling #201; Family #207 (24 West Lynwood Street)
Barnum, George C.; Head; Owns farm home; M; W; 37; Married; Can read and write; b. Illinois; Both parents b. Illinois; Speaks English; Manufacturer; Tents and awnings; Employer
Barnum, Margaret C.; Wife; F; W; 37; Married; Can read and write; b. Oklahoma; Father b. Nova Scotia, Canada (Scotch Origin); Mother b. Missouri; Speaks English; No occupation
In the 1930 US Census for District 32, Phoenix, Maricopa County, Arizona the family of George C. Barnum was enumerated as follows:
Dwelling #32; Family #33 (24 West Lynwood Street)
Barnum, George; Head; Owns non-farm home valued at $6,000; M; W; 47; Married; 1st married at age 28; Can read and write; b. Illinois; Both parents b. Illinois; Speaks English; Owner; Tent & awning; Employer; Non-veteran
Barnum, Margaret; Wife; F; W; 47; Married; 1st married at age 28; Can read and write; b. Oklahoma; Father b. Canada (English); Mother b. Missouri; Speaks English; No occupation
Barnum, Margaret C.; Daughter; F; W; 4; Single; b. Arizona; Father b. Illinois; Mother b. Oklahoma; No occupation