1930 United States census

1930 United States census
Original: United States Bureau of the Census Vector: Mysid · Public domain · source
Name	United States
Census year	1930
Population	123,202,624
Percent change	13.7%
Householder	27,138,000
Region type	states
Most populous	New York
Least populous	Nevada

1930 United States census was the fifteenth decennial enumeration of the United States population, conducted by the Department of Commerce through the Census Bureau under the administration of Herbert Hoover. The enumeration recorded a resident population of 123,202,624 and reflected demographic shifts evident during the Roaring Twenties, the onset of the Great Depression, and migrations tied to Prohibition and industrial expansion. The census informed policymaking by the United States Congress, the Supreme Court, and the Federal Reserve System amid changing labor and urban patterns.

Background

Preparations for the 1930 enumeration involved planners from the Census Bureau, statisticians associated with the Carnegie Institution, and advisors from universities such as Harvard University, University of Chicago, and Columbia University. Political leaders including Calvin Coolidge (whose term had just ended) and Franklin D. Roosevelt took interest in population shifts that affected representation for the United States House of Representatives and apportionment debates framed by lawmakers from the Democratic Party and the Republican Party. Legislative context included statutes enacted under presidents like Woodrow Wilson and earlier enumerations dating to the 1790 census tradition.

Data collection and methodology

Enumerators employed forms designed in consultation with demographers from Johns Hopkins University, economists linked to Princeton University, and public health officials from the United States Public Health Service. Field supervisors coordinated with local officials from jurisdictions such as New York City, Chicago, and Los Angeles, while tabulation utilized mechanical methods influenced by inventions from Herman Hollerith and firms like the IBM. Classification schemes referenced standards from the Bureau of Labor Statistics and census manuals circulated to enumerators in places from Texas to Alaska Territory. Questions covered household composition, birthplace, and occupation, following prior practice evident in the 1920 United States census but with adjustments reflecting industrial occupations in centers such as Pittsburgh, Detroit, and Cleveland.

Population results

The national total of 123,202,624 represented a 13.7% increase over the 1920 United States census figure, with the most populous state being New York and the least populous being Nevada. Urbanization trends showed concentrations in metropolitan areas including New York City, Chicago, Philadelphia, Detroit, and Boston. Regions such as the Northeast and Midwest exhibited growth tied to industrial hubs like Pittsburgh, St. Louis, and Cleveland, while parts of the South and the Great Plains showed slower increases or declines. Results influenced reapportionment affecting delegations from states like California, Ohio, Illinois, and Texas.

Demographic and social trends

The 1930 data illuminated migration streams such as the ongoing movement from rural areas to urban centers like Los Angeles and San Francisco, and the internal migration of African Americans from the South toward destinations in the North and Midwest including Chicago and Detroit, shaping patterns later studied in works by scholars at University of Chicago and Howard University. Occupational data highlighted employment in sectors dominated by firms like Ford Motor Company, United States Steel Corporation, and textile mills in Greensboro. Immigration trends—affected by the Immigration Act of 1924—altered demographic composition relative to earlier decades, influencing communities linked to Ellis Island arrivals and ports such as Boston and New York City. Household and housing statistics reflected conditions that policymakers in Washington, D.C. and reformers like Jane Addams had confronted in social surveys tied to settlement houses.

Impact and uses

Politicians in the United States House of Representatives and state legislatures used the 1930 figures for apportionment and redistricting, affecting power balances among leaders from parties such as the Democratic Party and the Republican Party. Economists at institutions including Federal Reserve Bank of New York and academics at Columbia University and University of Pennsylvania used the data to study the onset of the Great Depression and labor markets involving companies like General Motors and Standard Oil. Public health officials at the United States Public Health Service and urban planners collaborating with municipal governments in New York City and Chicago utilized housing and population density figures for programs related to sanitation and infrastructure, while historians and demographers from Princeton University and Yale University relied on the census for research into migration and social change.

Preservation and access

Original enumeration sheets and aggregate volumes were archived by the National Archives and Records Administration at repositories in College Park, Maryland and regional facilities serving researchers from institutions such as Library of Congress, New York Public Library, and university archives at University of Michigan. Microfilm copies were distributed to state libraries and historical societies in places like Massachusetts, Pennsylvania, and California. Modern access includes digitization efforts by organizations such as the National Archives and Records Administration and genealogical groups linked to Ancestry.com and FamilySearch, as well as research use by scholars at Harvard University, Stanford University, and local historical societies.

Category:United States census