1930 U.S. Federal Population Census; NARA Publication Number: T626; NARA Microfilm Roll Number: 643; Film Number: 2340378; Line Number: 56; Sheet: B; Sheet Number: 18; Birth Location: Iowa; Enumeration District: 7-19; Residence: Waterloo, Black Hawk, IA; Source: National Archives, Courtesy of FamilySearch.org

Albert Sweitzer was 55 years old when the 1930 U.S. Federal Population Census was taken.

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1910 U.S. Federal Population Census; Sheet: A; Sheet Number: 8; Birth Location: Iowa; Residence: Waterloo Ward 1, Black Hawk, IA; Source: National Archives, Courtesy of FamilySearch.org

Albert Sweitzer was 35 years old when the 1910 U.S. Federal Population Census was taken.