Historic US census - 1930

The Integrated Public Use Microdata Series (IPUMS) Complete Count Data include more than 650 million individual-level and 7.5 million household-level records. The microdata are the result of collaboration between IPUMS and the nation’s two largest genealogical organizations—Ancestry.com and FamilySearch—and provides the largest and richest source of individual level and household data.

综合公共使用微数据系列（Integrated Public Use Microdata Series，IPUMS）全计数数据集包含超过6.5亿条个人层面记录与750万条家庭层面记录。该微数据系IPUMS与全美两大家谱机构——Ancestry.com和FamilySearch——合作的成果，同时也是规模最大、内容最翔实的个人与家庭数据来源。